Verbseoul.
하다 verb
진압하다jinaphadato quell (a riot, revolt, protest, etc.)

To say to quell (a riot, revolt, protest, etc.) politely in the present tense, use 진압해요 (chee-nah-pae-yoh). Below is the full conjugation of 진압하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
진압해
chee-nah-pae
진압해요
chee-nah-pae-yoh
진압합니다
chee-nah-pahm-nee-dah
Past
진압했어
chee-nah-pae-ssuh
진압했어요
chee-nah-pae-ssuh-yoh
진압했습니다
chee-nah-pae-sseum-nee-dah
Future
진압할 거야
chee-nah-pahl- -guh-yah
진압할 거예요
chee-nah-pahl- -guh-yae-yoh
진압할 겁니다
chee-nah-pahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
진압하세요
chee-nah-pah-sae-yoh
Suggestion / Let's Polite (요)
진압해요
chee-nah-pae-yoh
Question Polite (요)
진압해요?
chee-nah-pae-yoh-?
Connective “and” — (고)
진압하고
chee-nah-pah-goh
Conditional “if” — (면)
진압하면
chee-nah-pah-myuhn
Noun form — (기)
진압함
chee-nah-pahm