Verbseoul.
regular
잃다ildato lose

To say to lose politely in the present tense, use 잃어요 (ee-ruh-yoh). Below is the full conjugation of 잃다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
잃어
ee-ruh
잃어요
ee-ruh-yoh
잃습니다
eel-seum-nee-dah
Past
잃었어
ee-ruh-ssuh
잃었어요
ee-ruh-ssuh-yoh
잃었습니다
ee-ruh-sseum-nee-dah
Future
잃을 거야
ee-reul- -guh-yah
잃을 거예요
ee-reul- -guh-yae-yoh
잃을 겁니다
ee-reul- -guhm-nee-dah

Other useful forms

Command Polite (세요)
잃으세요
ee-reu-sae-yoh
Suggestion / Let's Polite (요)
잃어요
ee-ruh-yoh
Question Polite (요)
잃어요?
ee-ruh-yoh-?
Connective “and” — (고)
잃고
eel-goh
Conditional “if” — (면)
잃으면
ee-reu-myuhn
Noun form — (기)
잃음
ee-reum