Verbseoul.
하다 verb (adj)

뚝뚝하다 conjugation (ttukttukhada, hard)

To say hard politely in the present tense, use 뚝뚝해요 (ttoog-ttoo-kae-yoh) · ttukttukaeyo. Below is the full conjugation of 뚝뚝하다 across the three tenses and three everyday speech levels.

Grammar note (하다 verb (adj)): 하다 adjectives use the same verb 하다 as a suffix to turn descriptive nouns into predicates (행복하다 = to be happy). They conjugate identically to 하다 verbs: the 하 contracts before -아/-어 suffixes to give 해. 행복해요, 행복했어요, 행복합니다. See all 하다 verbs →

Conjugation table

pron. = pronunciation guide  · RR = Revised Romanization

Highlighted = where the stem changes

TenseCasual (반말)Polite (요)Formal (합니다)
Present
뚝뚝해
ttoog-ttoo-kae
ttukttukae
뚝뚝해요
ttoog-ttoo-kae-yoh
ttukttukaeyo
뚝뚝합니다
ttoog-ttoo-kahm-nee-dah
ttukttukamnida
Past
뚝뚝했어
ttoog-ttoo-kae-ssuh
ttukttukaesseo
뚝뚝했어요
ttoog-ttoo-kae-ssuh-yoh
ttukttukaesseoyo
뚝뚝했습니다
ttoog-ttoo-kae-sseum-nee-dah
ttukttukaesseumnida
Future
뚝뚝할 거야
ttoog-ttoo-kahl guh-yah
ttukttukal geoya
뚝뚝할 거예요
ttoog-ttoo-kahl guh-yae-yoh
ttukttukal geoyeyo
뚝뚝할 겁니다
ttoog-ttoo-kahl guhm-nee-dah
ttukttukal geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
뚝뚝하세요
ttoog-ttoo-kah-sae-yoh
ttukttukaseyo
Suggestion / Let's Polite (요)
뚝뚝해요
ttoog-ttoo-kae-yoh
ttukttukaeyo
Question Polite (요)
뚝뚝해요?
ttoog-ttoo-kae-yoh-?
ttukttukaeyo?
Connective "and" — (고)
뚝뚝하고
ttoog-ttoo-kah-goh
ttukttukago
Conditional "if" — (면)
뚝뚝하면
ttoog-ttoo-kah-myuhn
ttukttukamyeon
Progressive (고 있어요)
뚝뚝하고 있어요
ttoog-ttoo-kah-goh ee-ssuh-yoh
ttukttukago isseoyo
Want to (고 싶어요)
뚝뚝하고 싶어요
ttoog-ttoo-kah-goh shee-puh-yoh
ttukttukago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
뚝뚝할 수 있어요
ttoog-ttoo-kahl soo ee-ssuh-yoh
ttukttukal su isseoyo
Because / So (아/어서)
뚝뚝해서
ttoog-ttoo-kae-suh
ttukttukaeseo
Noun form — (기)
뚝뚝하기
ttoog-ttoo-kah-gee
ttukttukagi
Noun form — (음)
뚝뚝함
ttoog-ttoo-kahm
ttukttukam