꼿꼿하다

strong, steady

Principal parts

관형사형Modifier
꼿꼿한
아/어Infinitive
꼿꼿해
-으니Since
꼿꼿하니
합니다Formal
꼿꼿합니다

Present

해요체Polite합니다체Formal해체Casual한다체Plain
서술Statement 꼿꼿해요꼿꼿합니다꼿꼿해꼿꼿하다

Past

해요체Polite합니다체Formal해체Casual한다체Plain
서술Statement 꼿꼿했어요꼿꼿했습니다꼿꼿했어꼿꼿했다

Future & presumptive

해요체Polite합니다체Formal해체Casual한다체Plain
-겠-Will / must be 꼿꼿하겠어요꼿꼿하겠습니다꼿꼿하겠어꼿꼿하겠다
-을 것이다Going to 꼿꼿할 거예요꼿꼿할 것입니다꼿꼿할 거야꼿꼿할 것이다

Questions

해요체Polite합니다체Formal해체Casual한다체Plain
현재Present 꼿꼿해요?꼿꼿합니까?꼿꼿해?꼿꼿하니?
과거Past 꼿꼿했어요?꼿꼿했습니까?꼿꼿했어?꼿꼿했니?

Negation

해요체Polite합니다체Formal해체Casual한다체Plain
안Not (short) 안 꼿꼿해요안 꼿꼿합니다안 꼿꼿해안 꼿꼿하다
-지 않다Not (long) 꼿꼿하지 않아요꼿꼿하지 않습니다꼿꼿하지 않아꼿꼿하지 않다

Honorific

해요체Polite합니다체Formal해체Casual한다체Plain
현재Present 꼿꼿하세요꼿꼿하십니다꼿꼿하셔꼿꼿하시다
과거Past 꼿꼿하셨어요꼿꼿하셨습니다꼿꼿하셨어꼿꼿하셨다

Modifying a noun

현재Present
꼿꼿한
과거Past
꼿꼿한
미래Future
꼿꼿할
회상Used to
꼿꼿하던

Joining clauses

-고and
꼿꼿하고
-게-ly / so that
꼿꼿하게
-어서so / and then
꼿꼿해서
-으니까since
꼿꼿하니까
-으면if / when
꼿꼿하면
-지만but
꼿꼿하지만
-는데and / but (setting up)
꼿꼿한데
-어도even if
꼿꼿해도

Sentence patterns

In real sentences

등이 꼿꼿하면 위가 튼튼해지죠

You got a firm back, strong stomach.

(대리 기사) 참 꼿꼿하시네요

You're always iron strong.

Common questions

How do you conjugate 꼿꼿하다 in Korean?

꼿꼿하다 (strong, steady) is 꼿꼿해요 in the polite 해요체, 꼿꼿합니다 in formal 합니다체, 꼿꼿해 in casual 반말 and 꼿꼿하다 in the plain written style. The past is 꼿꼿했어요.

What is the past tense of 꼿꼿하다?

꼿꼿했어요 in everyday polite speech, 꼿꼿했습니다 formally. It is built from the 아/어 form 꼿꼿하여 plus ㅆ, which is why an irregular stem shows its irregularity here.

Is 꼿꼿하다 irregular?

Yes — it is 여 irregular (여 불규칙). 하다 and every verb built on it: 하다 → 하여 → 해요. That is why the stem looks different in 꼿꼿하여 and 꼿꼿하니 but unchanged in 꼿꼿합니다.

What TOPIK level is 꼿꼿하다?

It carries no TOPIK grade. That is a fact about the published word lists rather than about the word — it conjugates by exactly the same rules as everything else.

Dictionary form, meaning, sentence patterns, examples and audio from the 국립국어원 한국어기초사전, used under CC BY-SA 2.0 KR.

Conjugations are generated by this site's own engine and checked against the 9,380 forms the dictionary publishes on every build.