Korean Science Discourse: -되 (do X, but) and -이라야 (only if it is)
Read and discuss science in Korean with two formal connectors: -되 grants something while attaching a caveat (실험은 하되, 안전 수칙은 지켜야 한다 — experiment, but follow the safety rules), and -이라야/-라야 marks the one condition that will do (검증된 결과라야 믿는다 — only verified results are believed), plus the academic suffixes -성, -화, -론.
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Written by Alvin Lim Certified Korean Language Teacher (Level 2)
Korean expert discourse runs on two formal connectors. -되 grants something while attaching a caveat (실험은 자유롭게 하되, 안전 수칙은 지켜야 한다 — experiment freely, but you must follow the safety rules), and -이라야/-라야 marks the one condition that will do (검증된 결과라야 믿을 수 있다 — only verified results can be trusted). Layer on the academic suffixes -성, -화, -론 and you can read a science article in Korean. Welcome to Grade 6 — near-native Korean, where the language turns formal, written, and precise.
This is the register of papers, lab reports, and serious journalism. You already learned to build an argument in writing back in academic writing; now we add the connectors that make Korean sound scientific. Start with the words that fill any science discussion.
Ten words for talking about science
Do it — but: -되
Attach -되 to a verb or adjective stem to grant something and immediately attach a caveat or condition. It is the formal, written sibling of -지만, and it is everywhere in rules, instructions, contracts, and academic prose.
실험은 자유롭게 하되, 안전 수칙은 지켜야 한다 = experiment freely, but you must keep the safety rules 인용은 하되, 출처를 반드시 밝혀라 = you may cite, but always state the source 결과는 인정하되, 해석은 신중히 해야 한다 = accept the result, but interpret it cautiously 지원은 하되 조건을 달다 = provide support, but attach conditions
The pattern is “yes to X — but on these terms.” That caveat-after-permission is exactly why -되 dominates formal writing, where every allowance comes with a limit.
Only if it is X: -이라야 / -라야
Attach -이라야 (after a consonant) or -라야 (after a vowel) to a noun to say it is the only thing that meets the condition — nothing else will do.
검증된 결과라야 믿을 수 있다 = only verified results can be trusted 재현이 되는 실험이라야 과학이다 = only a reproducible experiment is science 객관적인 데이터라야 설득력이 있다 = only objective data is convincing 전문가라야 판단할 수 있는 문제다 = it is a problem only an expert can judge
Compare it with -이어야(만) “must be”: both demand a condition, but -이라야 adds the exclusive ring “only if it is exactly this.” When the required condition is a noun, -이라야 is your tool.
Academic suffixes: -성, -화, -론
Sino-Korean suffixes pack whole concepts into one word. Learn these three and you can decode compounds you have never seen.
객관 + 성 → 객관성 = objectivity · 재현 + 성 → 재현성 = reproducibility 정량 + 화 → 정량화 = quantification · 일반 + 화 → 일반화 = generalization 진화 + 론 → 진화론 = theory of evolution · 환원 + 론 → 환원론 = reductionism
Strip the suffix, find the root, and the meaning falls out: 가능 (possible) + 성 = 가능성 (possibility); 산업 (industry) + 화 = 산업화 (industrialization); 방법 (method) + 론 = 방법론 (methodology).
Reading a science passage
Here is the formal written register in action — gene editing and AI, the way a Korean popular-science column would phrase it:
유전자 가위 기술은 질병 치료에 큰 가능성을 열되, 윤리적 검증을 거친 결과라야 임상에 적용할 수 있다. 인공지능의 예측도 마찬가지다. 정확도가 높다고 해서 무조건 믿을 것이 아니라, 재현성과 객관성이 확보된 데이터라야 과학적 근거로 인정된다.
Gene-editing technology opens great possibilities for treating disease — but only results that have passed ethical review can be applied in the clinic. The same goes for AI predictions: high accuracy alone is no reason to trust them blindly; only data with secured reproducibility and objectivity is accepted as scientific grounds.
Two grad students debate a study
The same forms, now in a lab-group chat — semi-formal, but the academic register leaks through:
Notice how 인정하되 and 세우되 grant a point before adding the catch, while 결과라야, 실험이라야, and 데이터라야 each name the single condition that counts. That is the rhythm of Korean scientific argument.
FAQ
What does -되 mean, and how is it different from -지만? -되 is a formal, written-register connective meaning ‘do/be X, but —’ or ‘X, provided that —.’ It attaches to a verb or adjective stem: 인용은 하되, 출처를 밝혀라 = you may cite, but state the source. Compared with the everyday -지만 (‘but’), -되 does two extra things: it sounds formal and literary (you meet it in rules, contracts, academic writing, and instructions), and it often grants an allowance while attaching a condition — ‘X is fine, but it must come with Y.’ So 하지만 simply contrasts two clauses, while 하되 lays down a rule: do it, but on these terms.
-이라야 and -어야 both feel like ‘must.’ When do I use -이라야/-라야? -이라야/-라야 attaches to a noun and marks it as the only thing that satisfies a condition: 검증된 결과라야 믿을 수 있다 = only verified results can be trusted (nothing else will do). Use -이라야 after a consonant (사실이라야) and -라야 after a vowel (데이터라야). It overlaps with -이어야(만) ‘must be,’ but -이라야 adds the exclusive flavor ‘only if it is exactly this.’ The verb/adjective equivalent is -어야/-아야 (재현이 돼야 한다 = it must reproduce), so reach for -이라야 specifically when the necessary condition is a noun.
What do the academic suffixes -성, -화, and -론 do? They build the abstract Sino-Korean vocabulary that fills science and academic writing. -성 makes a quality noun (‘-ness / -ity’): 객관성 objectivity, 재현성 reproducibility, 가능성 possibility. -화 makes a process noun (‘-ization’): 정량화 quantification, 일반화 generalization, 산업화 industrialization. -론 makes a ‘theory / -ism’ noun: 진화론 theory of evolution, 환원론 reductionism, 방법론 methodology. Recognizing the three lets you decode long academic compounds you have never seen — strip the suffix, find the root, and the meaning falls out.
Next: psychology discourse — -을라치면, -노라면, -기 일쑤이다. Previous: grade 5 review & mini TOPIK II. Full path: curriculum hub.