Verbseoul.
하다 verb (adj)
얌전하다yamjeonhadagentle, meek, obedient

To say gentle, meek, obedient politely in the present tense, use 얌전해요 (yahm-chuhn-hae-yoh). Below is the full conjugation of 얌전하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
얌전해
yahm-chuhn-hae
얌전해요
yahm-chuhn-hae-yoh
얌전합니다
yahm-chuhn-hahm-nee-dah
Past
얌전했어
yahm-chuhn-hae-ssuh
얌전했어요
yahm-chuhn-hae-ssuh-yoh
얌전했습니다
yahm-chuhn-hae-sseum-nee-dah
Future
얌전할 거야
yahm-chuhn-hahl- -guh-yah
얌전할 거예요
yahm-chuhn-hahl- -guh-yae-yoh
얌전할 겁니다
yahm-chuhn-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
얌전하세요
yahm-chuhn-hah-sae-yoh
Suggestion / Let's Polite (요)
얌전해요
yahm-chuhn-hae-yoh
Question Polite (요)
얌전해요?
yahm-chuhn-hae-yoh-?
Connective “and” — (고)
얌전하고
yahm-chuhn-hah-goh
Conditional “if” — (면)
얌전하면
yahm-chuhn-hah-myuhn
Noun form — (기)
얌전함
yahm-chuhn-hahm