Verbseoul.
하다 verb (adj)

견실하다 conjugation (gyeonsilhada, to act reliably)

To say to act reliably politely in the present tense, use 견실해요 (gyuhn-sheel-hae-yoh) · gyeonsilhaeyo. Below is the full conjugation of 견실하다 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
견실해
gyuhn-sheel-hae
gyeonsilhae
견실해요
gyuhn-sheel-hae-yoh
gyeonsilhaeyo
견실합니다
gyuhn-sheel-hahm-nee-dah
gyeonsilhamnida
Past
견실했어
gyuhn-sheel-hae-ssuh
gyeonsilhaesseo
견실했어요
gyuhn-sheel-hae-ssuh-yoh
gyeonsilhaesseoyo
견실했습니다
gyuhn-sheel-hae-sseum-nee-dah
gyeonsilhaesseumnida
Future
견실할 거야
gyuhn-sheel-hahl guh-yah
gyeonsilhal geoya
견실할 거예요
gyuhn-sheel-hahl guh-yae-yoh
gyeonsilhal geoyeyo
견실할 겁니다
gyuhn-sheel-hahl guhm-nee-dah
gyeonsilhal geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
견실하세요
gyuhn-sheel-hah-sae-yoh
gyeonsilhaseyo
Suggestion / Let's Polite (요)
견실해요
gyuhn-sheel-hae-yoh
gyeonsilhaeyo
Question Polite (요)
견실해요?
gyuhn-sheel-hae-yoh-?
gyeonsilhaeyo?
Connective "and" — (고)
견실하고
gyuhn-sheel-hah-goh
gyeonsilhago
Conditional "if" — (면)
견실하면
gyuhn-sheel-hah-myuhn
gyeonsilhamyeon
Progressive (고 있어요)
견실하고 있어요
gyuhn-sheel-hah-goh ee-ssuh-yoh
gyeonsilhago isseoyo
Want to (고 싶어요)
견실하고 싶어요
gyuhn-sheel-hah-goh shee-puh-yoh
gyeonsilhago sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
견실할 수 있어요
gyuhn-sheel-hahl soo ee-ssuh-yoh
gyeonsilhal su isseoyo
Because / So (아/어서)
견실해서
gyuhn-sheel-hae-suh
gyeonsilhaeseo
Noun form — (기)
견실하기
gyuhn-sheel-hah-gee
gyeonsilhagi
Noun form — (음)
견실함
gyuhn-sheel-hahm
gyeonsilham