Verbseoul.
하다 verb (adj)
견실하다gyeonsilhadato act reliably

To say to act reliably politely in the present tense, use 견실해요 (gyuhn-sheel-hae-yoh). Below is the full conjugation of 견실하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
견실해
gyuhn-sheel-hae
견실해요
gyuhn-sheel-hae-yoh
견실합니다
gyuhn-sheel-hahm-nee-dah
Past
견실했어
gyuhn-sheel-hae-ssuh
견실했어요
gyuhn-sheel-hae-ssuh-yoh
견실했습니다
gyuhn-sheel-hae-sseum-nee-dah
Future
견실할 거야
gyuhn-sheel-hahl- -guh-yah
견실할 거예요
gyuhn-sheel-hahl- -guh-yae-yoh
견실할 겁니다
gyuhn-sheel-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
견실하세요
gyuhn-sheel-hah-sae-yoh
Suggestion / Let's Polite (요)
견실해요
gyuhn-sheel-hae-yoh
Question Polite (요)
견실해요?
gyuhn-sheel-hae-yoh-?
Connective “and” — (고)
견실하고
gyuhn-sheel-hah-goh
Conditional “if” — (면)
견실하면
gyuhn-sheel-hah-myuhn
Noun form — (기)
견실함
gyuhn-sheel-hahm