Verbseoul.
하다 verb
진정하다jinjeonghadato relax, to soothe

To say to relax, to soothe politely in the present tense, use 진정해요 (cheen-chuhng-hae-yoh). Below is the full conjugation of 진정하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
진정해
cheen-chuhng-hae
진정해요
cheen-chuhng-hae-yoh
진정합니다
cheen-chuhng-hahm-nee-dah
Past
진정했어
cheen-chuhng-hae-ssuh
진정했어요
cheen-chuhng-hae-ssuh-yoh
진정했습니다
cheen-chuhng-hae-sseum-nee-dah
Future
진정할 거야
cheen-chuhng-hahl- -guh-yah
진정할 거예요
cheen-chuhng-hahl- -guh-yae-yoh
진정할 겁니다
cheen-chuhng-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
진정하세요
cheen-chuhng-hah-sae-yoh
Suggestion / Let's Polite (요)
진정해요
cheen-chuhng-hae-yoh
Question Polite (요)
진정해요?
cheen-chuhng-hae-yoh-?
Connective “and” — (고)
진정하고
cheen-chuhng-hah-goh
Conditional “if” — (면)
진정하면
cheen-chuhng-hah-myuhn
Noun form — (기)
진정함
cheen-chuhng-hahm