Verbseoul.
regular
숨지다sumjidadie (pass away)

To say die (pass away) politely in the present tense, use 숨져요 (soom-chyuh-yoh). Below is the full conjugation of 숨지다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
숨져
soom-chyuh
숨져요
soom-chyuh-yoh
숨집니다
soom-cheem-nee-dah
Past
숨졌어
soom-chyuh-ssuh
숨졌어요
soom-chyuh-ssuh-yoh
숨졌습니다
soom-chyuh-sseum-nee-dah
Future
숨질 거야
soom-cheel- -guh-yah
숨질 거예요
soom-cheel- -guh-yae-yoh
숨질 겁니다
soom-cheel- -guhm-nee-dah

Other useful forms

Command Polite (세요)
숨지세요
soom-chee-sae-yoh
Suggestion / Let's Polite (요)
숨져요
soom-chyuh-yoh
Question Polite (요)
숨져요?
soom-chyuh-yoh-?
Connective “and” — (고)
숨지고
soom-chee-goh
Conditional “if” — (면)
숨지면
soom-chee-myuhn
Noun form — (기)
숨짐
soom-cheem