두껍다

to be thick

Principal parts

관형사형Modifier
두꺼운
아/어Infinitive
두꺼워
-으니Since
두꺼우니
합니다Formal
두껍습니다

Present

해요체Polite합니다체Formal해체Casual한다체Plain
서술Statement 두꺼워요두껍습니다두꺼워두껍다

Past

해요체Polite합니다체Formal해체Casual한다체Plain
서술Statement 두꺼웠어요두꺼웠습니다두꺼웠어두꺼웠다

Future & presumptive

해요체Polite합니다체Formal해체Casual한다체Plain
-겠-Will / must be 두껍겠어요두껍겠습니다두껍겠어두껍겠다
-을 것이다Going to 두꺼울 거예요두꺼울 것입니다두꺼울 거야두꺼울 것이다

Questions

해요체Polite합니다체Formal해체Casual한다체Plain
현재Present 두꺼워요?두껍습니까?두꺼워?두꺼우니?
과거Past 두꺼웠어요?두꺼웠습니까?두꺼웠어?두꺼웠니?

Negation

해요체Polite합니다체Formal해체Casual한다체Plain
안Not (short) 안 두꺼워요안 두껍습니다안 두꺼워안 두껍다
-지 않다Not (long) 두껍지 않아요두껍지 않습니다두껍지 않아두껍지 않다

Honorific

해요체Polite합니다체Formal해체Casual한다체Plain
현재Present 두꺼우세요두꺼우십니다두꺼우셔두꺼우시다
과거Past 두꺼우셨어요두꺼우셨습니다두꺼우셨어두꺼우셨다

Modifying a noun

현재Present
두꺼운
과거Past
두꺼운
미래Future
두꺼울
회상Used to
두껍던

Joining clauses

-고and
두껍고
-게-ly / so that
두껍게
-어서so / and then
두꺼워서
-으니까since
두꺼우니까
-으면if / when
두꺼우면
-지만but
두껍지만
-는데and / but (setting up)
두꺼운데
-어도even if
두꺼워도

Sentence patterns

In real sentences

이 두꺼운 책의 중심 인물이 아서 왕이었음을 보아

The centerpiece of this tome was King Arthur.

오늘 추우니까 두껍게 입고 다녀.

It's cold today, so wear thick clothes.

이게 두껍고 좋아 보이는군요

Oh, wait, this looks promising. A nice, thick wire.

약간 더 두껍게 그리겠습니다.

I need to draw it a little thicker.

Common questions

How do you conjugate 두껍다 in Korean?

두껍다 (to be thick) is 두꺼워요 in the polite 해요체, 두껍습니다 in formal 합니다체, 두꺼워 in casual 반말 and 두껍다 in the plain written style. The past is 두꺼웠어요.

What is the past tense of 두껍다?

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

Is 두껍다 irregular?

Yes — it is ㅂ irregular (ㅂ 불규칙). ㅂ becomes 우 before a vowel: 춥다 → 추워요. That is why the stem looks different in 두꺼워 and 두꺼우니 but unchanged in 두껍습니다.

What TOPIK level is 두껍다?

2급 — TOPIK 2, elementary.

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.