The fear of numbers might just be in our heads and we might have enough number knowledge to get by with. That’s what we’ll be exploring in this programme while looking at some relevant vocabulary.
새내기할배 블로그가 제안하는 영어단어 암기법은 기본적으로 문장을 통해 암기하는 것입니다. 그래서 설명하는 모든 단어마다 본문도 함께 제시됩니다. 그러나 새로 나온다고 해서 모든 단어를 무한정 암기할 수는 없습니다. 그래서 암기해야 해야 할 단어와 이해만 하고 넘어갈 단어를 구분하는 지혜가 필요합니다.
[BBC Leaning English] 6 Minute English - The fear of numbers에 수록된 영어단어 수는
- 고유명사를 제외하고 총 318개 입니다.
- 이중 OxFord 3000단어와 일치하는 영어단어는 305개로 96%가 해당됩니다.
- 미국의 WordFrequency 사이트에서 조사한 Top 5,000내 포함하는 영어단어는 285개로 90%가 해당됩니다.
- Naver 사전에서 [★★/매우 중요]로 분류된 영어단어는 298개로 94%가 해당됩니다.
- 세개의 기준에 모두 일치하는 영어단어는 모두 282개로 89%의 싱크로율을 보입니다.
이들 기준에 해당되는 영어단어 중 암기해야 할 단어의 수준을 각자 정하고 그 수준의 영어단어가 나오면 문장과 함께 암기하는 습관을 들이면 영어단어공부에 큰 성과를 거둘 수 있을 것입니다
이 블로그에는 [BBC 6분 영어와 관련하여 매주 다음과 같은 글들이 게시 됩니다
- 단어공부(금주 대본에 나온 주요 어휘) 이 글입니다
- 멀티단어공부(금주 대본에 사용된 멀티단어(구동사, 숙어) 간단 정리) 이 글의 포스팅 시점에는 아직 작성되지 않았습니다..
advertiser [명사] [R; 5001+] [★] [레마] advert < vert
[본문] [29]Because we are primed not to question numbers, certain people have learned that numbers are perhaps the most powerful tools for deception... advertisers, marketers, politicians, who try to convince the public through spurious oratory - have learned that the one thing they can't get challenged on is numbers or challenges are ineffective.
[영영] An advertiser is a person or company that pays for a product, event, or job to be advertised in a newspaper, on television, or on a poster.
[영한] ⒨ 광고주
[활용] 복수형; advertisers
[파생] advertisable, advertisement, advertiser, advertizer, advertise
[어근] ⑴ ad; 향하여, 첨가, to ⑵ vert(verse); 돌다 ⑶ ish; 동사 어미 ⑷ er; 명사 어미
algebra [명사] [R; 5001+] [★] [레마] algebra
[본문] [10]algebra, geometry, times tables - it was all very confusing.
[영영] Algebra is a type of mathematics in which letters are used to represent possible quantities.
[영한] ⒨ 대수학
[첫뜻] formal mathematics; the analysis of equations; the art of reasoning about quantitative relations by the aid of a compact and highly systematized notation,
[활용] [U]
[파생] algebraic, algebraist, algebra
[어원] al-jabr(Arabic), [al+jabara] the reunion of broken parts; bone-setting
anxious [형용사] [Oxf3] [Rank; 3864] [★★] [레마] anxious
[본문] [40]Even talking about numbers makes me anxious.
[영영] If you are anxious to do something or anxious that something should happen, you very much want to do it or very much want it to happen.
[영한] ⒨ ① 불안해하는, 염려하는 ② 불안하게 하는, 불안해 보이는 ③ 열망하는, 간절히 바라는
[첫뜻] greatly troubled by uncertainties,
[파생] anxiety, anxiously, anxiousness, anxious
[어근] ⑴ anxi(anx); 화가나다, choke ⑵ ous; 형용사어미
[어원] anxius(Latin), uneasy, troubled in mind
anytime [부사] [R; 5001+] [★] [레마] time
[본문] [62]I don't think I'll be using that number anytime soon.
[영영] You use anytime to mean a point in time which is not fixed or set.
[영한] ⒨ ① 언제든지 ② 언제나, 반드시, 예외 없이
<명사> 언제라도 <감탄사> 언제든지 좋아요, 천만에요, 괜찮아요
[구성단어] any + time
cent [명사] [Oxf3] [R; 5001+] [★★] [레마] cent
[본문] [37]So, Sam, if I said to you ten per cent of the ten million people who eat meat have a twenty per cent chance of being five per cent overweight - would you challenge that?
[영영] A cent is a small unit of money worth one hundredth of some currencies, for example the dollar and the euro. → see also per cent
[영한] ⒨ (약어:c, ct) 센트(100분의 1달러나 유로)
[활용] 복수형; cents
[어근] cent; 백(100)
classmate [명사] [R; 5001+] [★] [레마] class
[본문] [41]Well, interestingly, The Why Factor programme explained that girls are more anxious about learning maths, but even if they feel more nervous about maths, they aren't any worse with numbers than their more confident classmates.
[영영] Your classmates are students who are in the same class as you at school or college.
[영한] ⒨ 급우, 반 친구
[활용] 복수형; classmates
[구성단어] class + mate
complicate [동사] [Oxf5] [R; 5001+] [★★] [레마] complicate < plic
[본문] [25]What put me off maths was it was not only complicated but very theoretical - and not very practical - useful for real-life situations.
[영영] To complicate something means to make it more difficult to understand or deal with.
[영한] ⒨ (더) 복잡하게 만들다
[첫뜻] to intertwine
[활용] complicated, complicated, complicating, complicates
[파생] complicacy, complication, complicate
[어근] ⑴ com; 함께, with ⑵ plic; 접은, fold ⑶ ate; 동사어미
correctly [부사] [Oxf3] [Rank; 4410] [★★] [레마] correct < rect
[본문] [54]I wonder if you worked out the answer to my question correctly, Neil?
[영한] ⒨ 바르게, 정확하게, [문장을 수식하여] 정확히 말하면
[파생] correct, correctable, correctible, correction, correctly, correctness, corrector
[유의어] rightly
[어근] ⑴ cor(com); together ⑵ rect; 바른, rule ⑶ ly; 부사 어미
deception [명사] [R; 5001+] [★] [레마] deceive < capt
[본문] [29]Because we are primed not to question numbers, certain people have learned that numbers are perhaps the most powerful tools for deception... advertisers, marketers, politicians, who try to convince the public through spurious oratory - have learned that the one thing they can't get challenged on is numbers or challenges are ineffective.
[영한] ⒨ ① 속임, 기만, 사기 ② 속임수
[활용] 복수형; deceptions
[파생] deceit, deceivability, deceivable, deceivableness, deceivably, deceive, deceiver, deceivingly, deception, deceptional, deceptive, deceptively
[유의어] deceit, deceit(기만)
[어근] ⑴ de; from ⑵ cept(capt); to take ⑶ ion(ation); 명사 어미
dislike [동사] [Oxf3] [R; 5001+] [★★] [레마] dislike < like
[본문] [24]'Put off' means make someone dislike something.
[영영] If you dislike someone or something, you consider them to be unpleasant and do not like them.
[영한] ⒨ 싫어하다
[첫뜻] be displeased with, regard with some aversion or displeasure
[활용] disliked, disliked, disliking, dislikes
[파생] dislikable, dislikeable, dislike
[반의어] like
<명사> ① 반감, 싫음 ② 싫어하는 것
[어근] ⑴ dis; 不, 非, not ⑵ like; like
fool [동사] [Oxf5] [Rank; 4071] [★★] [레마] fool
[본문] [26]And the problem now is, it's easy to be fooled by fancy figures that we get told about.
[영영] If someone fools you, they deceive or trick you.
[영한] ⒨ ① 속이다, 기만하다 ② (흔히 사람들을 웃기려고) 어릿광대[바보] 짓을 하다
[첫뜻] to be foolish, act the fool
[활용] fooled, fooled, fooling, fools
[파생] foolish, foolishly, foolishness, fool
<명사> ① 바보 ② (과거 왕이 고용하던) 어릿광대 ③ 풀(과일을 삶아 으깬 것에 크림이나 커스터드(custard)를 섞어 차게 먹는 디저트) <형용사> 바보 같은
[어원] follus(Latin), [from Latin follis] foolish
genius [명사] [Oxf5] [Rank; 4105] [★★] [레마] genius < gener
[본문] [53]We might not be a genius like Einstein, but we know enough to work things out.
[영영] Genius is very great ability or skill in a particular subject or activity.
[영한] ⒨ ① 천재성 ② 천재, 귀재 ③ 특별한 재능
[첫뜻] tutelary or moral spirit
[활용] 복수형; geniuses genii
[어근] genius(gener); 자식을 보다, beget
[어원] genere(Latin),
geometry [명사] [R; 5001+] [★] [레마] geometry < meter
[본문] [10]Algebra, geometry, times tables - it was all very confusing.
[영영] Geometry is the branch of mathematics concerned with the properties and relationships of lines, angles, curves, and shapes.
[영한] ⒨ ① 기하학 ② 기하학적 구조
[활용] [U]
[파생] geometric, geometrical, geometrize, geometry
[어근] ⑴ geo; 땅, earth ⑵ metr(meter); 측량, measure ⑶ y; 명사 어미
googol [명사] [R; 5001+] [레마] googol
[본문] [15]It's thought the largest number in the world is called a googol.
[영영] the number represented as one followed by 100 zeros (10 100)
[영한] ⒨ (수학) 구골(10100. 또는 1에 영(0)이 100개 붙은 수)
[첫뜻] Mathematics and the Imagination,
[어원] googol(English), coined by E, Kasner (1878-1955), American mathematician
inaccurate [형용사] [R; 5001+] [레마] inaccurate < cure
[본문] [34]So, when politicians, for example, do good and effective public speaking - known as oratory - the information they give could be spurious - that means false, not correct or inaccurate.
[영영] If a statement or measurement is inaccurate, it is not accurate or correct.
[영한] ⒨ 부정확한, 오류가 있는
[첫뜻] not exact or correct,
[파생] inaccuracy, inaccurately, inaccurateness, inaccurate
[반의어] accurate, accurate(정확하다)
[어근] ⑴ in; 아님(不), not ⑵ ac(ad); 향하여,첨가 ⑶ cur; 보살피다 ⑷ ate; 동사 어미
ineffective [형용사] [R; 5001+] [레마] effect < fact
[본문] [29]Because we are primed not to question numbers, certain people have learned that numbers are perhaps the most powerful tools for deception... advertisers, marketers, politicians, who try to convince the public through spurious oratory - have learned that the one thing they can't get challenged on is numbers or challenges are ineffective.
[영영] If you say that something is ineffective, you mean that it has no effect on a process or situation.
[영한] ⒨ 효과[효력] 없는, 효과적이지 못한
[파생] ineffectively, ineffectiveness, ineffective
[반의어] effective, effective(효과적이다)
[어근] ⑴ in(en); 안에 두다, 하게 하다, in ⑵ ef(ex); 밖으로, out ⑶ fect(fac); 만들다, make, 하다 ⑷ ive; 형용사 어미
Interestingly [부사] [R; 5001+] [레마] interest
[본문] [41]Well, Interestingly, The Why Factor programme explained that girls are more anxious about learning maths, but even if they feel more nervous about maths, they aren't any worse with numbers than their more confident classmates.
[영영] Interesting + ly
[영한] ⒨ 흥미있게, 재미있게.
[파생] Interestingly, interesting
[어근] ⑴ inter; between ⑵ est(esse); 존재, to be ⑶ ing; 형용사 어미 ⑷ ly; 부사 어미
interpret [동사] [Oxf3] [Rank; 2783] [★★] [레마] interpret < preci
[본문] [6]If you mean, am I someone who understands numbers and is good as using them and interpreting data, then no!
[영영] If you interpret something in a particular way, you decide that this is its meaning or significance.
[영한] ⒨ ① (의미를) 설명[해석]하다 ② (특정한 뜻으로) 이해[해석]하다 ③ 통역하다 ④ (연주자/배우 등이 음악 작품/배역 등을 나름대로 해석하여) 연주[연기]하다
[첫뜻] expound the meaning of, render clear or explicit
[활용] interpreted interpreted interpreting interprets
[파생] interpret, interpretable, interpretably, interpretational, interpretative, interpretation
[유의어] translated, read
[어근] ⑴ inter; 사이, among ⑵ pret(preci); 평가, value
[어원] interpretari(Latin), explain, expound, understand
knock [동사] [Oxf3] [Rank; 2105] [★★] [레마] knock
[본문] [43]Well maybe, but one bad experience can knock our confidence and ability to use maths.
[영영] If you knock on something such as a door or window, you hit it, usually several times, to attract someone's attention.
[영한] ⒨ ① (문 등을 똑똑 하고) 두드리다, 노크하다 ② (흔히 모르고) 치다[찧다/부딪치다] ③ (때리거나 타격을 가해) …한 상태가 되게 만들다 ④ (움직이도록) 치다[두드리다], 부수다[깨다] ⑤ 두드려[쳐서] (구멍을) 내다
[활용] knocked, knocked, knocking, knocks
[유의어] rap
<명사> ① 노크[문 두드리는] 소리 ② (단단한 것에 꽝 하고) 부딪침[찧기], 타격
[어원] cnocian(Old English), to pound, beat;, knock (on a door)
marketer [명사] [R; 5001+] [레마] market
[본문] [29]Because we are primed not to question numbers, certain people have learned that numbers are perhaps the most powerful tools for deception... advertisers, marketers, politicians, who try to convince the public through spurious oratory - have learned that the one thing they can't get challenged on is numbers or challenges are ineffective.
[영영] A marketer is someone whose job involves marketing.
[영한] ⒨ 장 보러 가는 사람, 시장에서 매매하는 사람[회사], 시장 경영자, 마케팅 담당자
[파생] marketer, market
[어근] ⑴ mark(merce); 상업, 시장, merchandise ⑵ et; 명사 어미 ⑶ er; 명사 어미
mathematical [형용사] [Oxf5] [R; 5001+] [레마] mathematic
[본문] [52]We want to develop numeracy - basic mathematical skills - to use numbers in a particular situation that we are in.
[영영] Something that is mathematical involves numbers and calculations.
[영한] ⒨ ① 수학(상)의, 수리적(數理的)인 ② 아주 정확한, 엄밀한 ③ 있을 것 같지 않은
[어근] ⑴ mathem; 배우다, learn ⑵ atic; 명사 어미 ⑶ al; 형용사 어미
mathematician [명사] [R; 5001+] [레마] mathematic
[본문] [48]I'm not saying we're all going to grow up to be mathematicians but we're all going to get to a point where we have the basic numeracy skills that we need to be able to cope in our environment...
[영영] A mathematician is a person who is trained in the study of numbers and calculations.
[영한] ⒨ 수학자
[활용] 복수형; mathematicians
[어근] ⑴ mathem; 배우다, learn ⑵ atic; 명사 어미
mercy [명사] [Oxf5] [R; 5001+] [★★] [레마] mercy
[본문] [28]They spoke to Charles Seife, who's an author and professor at New York University, who explained why we are at the mercy of people who throw numbers at us….
[영영] If someone in authority shows mercy, they choose not to harm someone they have power over, or they forgive someone they have the right to punish.
[영한] ⒨ ① 자비 ② 고마운[다행스러운] 일
[첫뜻] God's forgiveness of his creatures' offenses,
[활용] 복수형; mercies
[파생] merciful, mercifulness, mercy
[유의어] humanity, quarter(자비)
[어근] ⑴ merc(merce); 상업, 시장, merchandise ⑵ y; 명사 어미
mere [형용사] [Oxf5] [Rank; 2948] [★★] [레마] mere
[본문] [61]power - so a mere 100 zeros.
[영영] You use mere to emphasize how unimportant or inadequate something is, in comparison to the general situation you are describing.
[영한] ⒨ ① 겨우 …의, (한낱) …에 불과한 ② 단지 …만의(무엇이 있다는 사실 자체가 뚜렷한 영향을 미치기에 충분하다는 뜻을 나타낼 때 씀)
[첫뜻] pure, clear
[활용] 비교; mere < mere < merest
[파생] merely, mere
[유의어] very(만으로도)
<명사> (문예체) 작은 호수 <동사> (경계선의) 위치를 기록하다.
[어원] ⓐmerus(Latin), unmixed, undiluted, unmixed of wine; pure; bare, naked; true, real, genuine
ⓑmære(Old English), boundary, object indicating a boundary
numb [형용사] [R; 5001+] [★] [레마] numb
[본문] [12]But the fear of numbers might just be in our heads and we might have enough number knowledge to get by with.
[영영] If a part of your body is numb, you cannot feel anything there.
[영한] ⒨ ① (추위 등으로 신체 부위가) 감각이 없는 ② (제대로 생각반응을 못하고) 멍한[망연자실한]
[첫뜻] deprived of motion or feeling, powerless to feel or act
[활용] 비교; numb < number < numbest
[파생] numbly, numbness, numb
[유의어] dead
<동사> ① (신체 부위에) 감각이 없게 만들다 ② (충격 등으로) 멍하게[망연자실하게] 만들다
[어원] niman(Old English), to take, catch, grasp
numeracy [명사] [R; 5001+] [레마] numer
[본문] [48]I'm not saying we're all going to grow up to be mathematicians but we're all going to get to a point where we have the basic numeracy skills that we need to be able to cope in our environment...
[영영] Numeracy is the ability to do arithmetic.
[영한] ⒨ (기본적인) 산술 능력, 수리 감각
[활용] [U]
[어근] ⑴ numer; 숫자, number ⑵ acy(cy); 명사 어미
oratory [명사] [R; 5001+] [★] [레마] orate
[본문] [29]Because we are primed not to question numbers, certain people have learned that numbers are perhaps the most powerful tools for deception... advertisers, marketers, politicians, who try to convince the public through spurious oratory - have learned that the one thing they can't get challenged on is numbers or challenges are ineffective.
[영영] Oratory is the art of making formal speeches which strongly affect people's feelings and beliefs.
[영한] ⒨ ① 웅변술 ② 기도실, (작은) 예배당
[활용] 복수형; oratories
[파생] oratorical, oratorically, oratory
[유의어] rhetoric
[어근] ⑴ orat(ora); 말하다. speak ⑵ ory; 명사 어미
overweight [형용사] [R; 5001+] [★] [레마] weigh
[본문] [37]So, Sam, if I said to you ten per cent of the ten million people who eat meat have a twenty per cent chance of being five per cent overweight - would you challenge that?
[영영] Someone who is overweight weighs more than is considered healthy or attractive.
[영한] ⒨ ① (사람이) 과체중의, 비만의 ② 중량 초과의
[반의어] underweight
[구성단어] over + weight
persuasive [형용사] [R; 5001+] [★] [레마] persuade
[본문] [35]But numbers are more persuasive - they make you believe something is true.
[영영] Someone or something that is persuasive is likely to persuade a person to believe or do a particular thing.
[영한] ⒨ 설득력 있는
[파생] persuadability, persuadable, persuader, persuasibility, persuasible, persuasion, persuasive, persuasively, persuasiveness, persuade
[어근] ⑴ per; 통하다(through) ⑵ suas(suade); 충고, urge, advise ⑶ ive; 형용사 어미
real-life [형용사] [R; 5001+] [레마] life
[본문] [25]What put me off maths was it was not only complicated but very theoretical - and not very practical - useful for real-life situations.
[영한] ⒨ 실제[현실/실생활]의 반의어 fictional
[반의어] fictional
[구성단어] real + life
relevant [형용사] [Oxf3] [Rank; 2838] [★★] [레마] relevant < levy
[본문] [13]That's what we'll be exploring in this programme while looking at some relevant vocabulary.
[영영] Something that is relevant to a situation or person is important or significant in that situation or to that person.
[영한] ⒨ ① (논의 중인 주제/생각하는 상황과 밀접하게) 관련 있는, 적절한 ② (사람들의 삶 등에) 의의가 있는[유의미한]
[첫뜻] pertinent to the matter at hand
[파생] relevance, relevancy, relevantly, relevant
[유의어] applicable(해당되다)
[반의어] irrelevant(관련 있다)
[어근] ⑴ re; intensive ⑵ lev; lighten, raise ⑶ ant; ~의(형용사어미)
spurious [형용사] [R; 5001+] [★] [레마] spurious
[본문] [29]Because we are primed not to question numbers, certain people have learned that numbers are perhaps the most powerful tools for deception... advertisers, marketers, politicians, who try to convince the public through spurious oratory - have learned that the one thing they can't get challenged on is numbers or challenges are ineffective.
[영영] Something that is spurious seems to be genuine, but is false.
[영한] ⒨ ① 거짓된, 겉으로만 그럴싸한 ② 비논리적인
[첫뜻] born out of wedlock,
[파생] spuriously, spuriousness, spurious
[어원] spurius(Latin), illegitimate, false
St [약어명사] [R; 5001+] [레마] St
[본문] [44]Take comfort from Paula Miles, who teaches StatiStics to psychology Students at St. Andrews University.
[영한] ⒨ ① (글로 쓴 주소에서) 거리 ② 국가 ③ 성인
[Full] saint
statistics [명사] [Rank; 2733] [★★] [레마] statistics
[본문] [44]Take comfort from Paula Miles, who teaches statistics to psychology students at St. Andrews University.
[영영] ① a branch of mathematics dealing with the collection, analysis, interpretation, and presentation of masses of numerical data
② a collection of quantitative data
[영한] ⒨ ① 통계, 통계표, 통계 자료 ② 통계학
[첫뜻] science dealing with data about the condition of a state or community
[활용] [PL]
[어근] ⑴ state; 상태 ⑵ istic; 형용사 어미 ⑶ s; 명사 어미
survival [명사] [Oxf5] [Rank; 2679] [★★] [레마] survive < viv
[본문] [51]Yes, I think it's about survival.
[영영] If you refer to the survival of something or someone, you mean that they manage to continue or exist in spite of difficult circumstances.
[영한] ⒨ ① 생존 ② 유물
[활용] 복수형; survivals
[파생] survivability, survivable, survival, survive, survivor
[유의어] relic(유물)
[어근] ⑴ sur(super); over ⑵ vive(viv); 살대, to live ⑶ al; 형용사 어미
theoretical [형용사] [Oxf5] [Rank; 3820] [★★] [레마] theory
[본문] [25]What put me off maths was it was not only complicated but very theoretical - and not very practical - useful for real-life situations.
[영한] ⒨ ① 이론의, 이론적인 ② 이론상으로 (가능한)
[첫뜻] contemplative
[파생] theoretical, theoretically, theory
[반의어] experimental, practical, empirical
[어근] ⑴ theor(thea); to consider, look at ⑵ et; 명사 지소(指小) 어미 ⑶ ical(ic); 형용사어미
unlikely [형용사] [Oxf3] [Rank; 2710] [★★] [레마] like
[본문] [36]So, unless you're confident with numbers, you're unlikely to challenge the facts and figures that you are given.
[영영] If you say that something is unlikely to happen or unlikely to be true, you believe that it will not happen or that it is not true, although you are not completely sure.
[영한] ⒨ ① …할[일] 것 같지 않은, 있음직하지[있을 것 같지] 않은 ② (일반적인) 예상 밖의 ③ 믿기 힘든
[첫뜻] not likely to occur
[활용] 비교; unlikely < unlikelier < unlikeliest
[파생] unlikelihood, unlikeliness, unlikely
[유의어] implausible
[반의어] likely
<부사> 있을[…할] 것 같지 않게
[어근] ⑴ un; 아님(不, 無), not ⑵ like; like ⑶ ly; 부사/형용사 어미
zero [명사] [Oxf3] [R; 5001+] [★★] [레마] zero
[본문] [16]It's written with a 1 and how many zeros?
[영영] Zero is the number 0.
[영한] ⒨ ① (pl. zeros) 0, 영(零), 제로 ② (온도압력 등의) 영(零), 영도(零度) ③ 무(無), 제로
[첫뜻] figure which stands for naught in the Arabic notation
[활용] 복수형; zeros zeroes
<동사> (계기 등을) 영[제로]에 맞추다 <형용사> ① 0(도)의, 제로의 ② 조금도 없는, 결여되어 있는 ③ (기상) (시계(視界)가) 제로인
[어원] sifr(Arabic), cipher, zero; ; empty, nothing
새내기할배의 [영어단어공부]자료를 처음 보시는 분은 <다음> 링크를 클릭하셔서 BBC Learning English 6 Minute English [공부법]을 먼저 보시기 바랍니다
https://softca.blog.me/221610250801
본 글은 Word Frequency 기준 2000순위 이하를 제외한 단어만을 수록하고 있습니다.
본 자료는 PDF 파일로 다운 받을 수 있습니다.
6 Minute English는 BBC Learning English 사이트에서 매주 출간하는 무료 영어 교육 콘텐츠이며 오디오 파일과 대본(Script) 파일을 제공합니다.
https://www.bbc.co.uk/learningenglish/english/features/6-minute-english/ep-210823