Verbseoul.
하다 verb
패전하다paejeonhadato lose, to be defeated (in a war or sporting event)

To say to lose, to be defeated (in a war or sporting event) politely in the present tense, use 패전해요 (pae-chuhn-hae-yoh). Below is the full conjugation of 패전하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
패전해
pae-chuhn-hae
패전해요
pae-chuhn-hae-yoh
패전합니다
pae-chuhn-hahm-nee-dah
Past
패전했어
pae-chuhn-hae-ssuh
패전했어요
pae-chuhn-hae-ssuh-yoh
패전했습니다
pae-chuhn-hae-sseum-nee-dah
Future
패전할 거야
pae-chuhn-hahl- -guh-yah
패전할 거예요
pae-chuhn-hahl- -guh-yae-yoh
패전할 겁니다
pae-chuhn-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
패전하세요
pae-chuhn-hah-sae-yoh
Suggestion / Let's Polite (요)
패전해요
pae-chuhn-hae-yoh
Question Polite (요)
패전해요?
pae-chuhn-hae-yoh-?
Connective “and” — (고)
패전하고
pae-chuhn-hah-goh
Conditional “if” — (면)
패전하면
pae-chuhn-hah-myuhn
Noun form — (기)
패전함
pae-chuhn-hahm