Verbseoul.
하다 verb
위협하다wihyeophadato threaten, to menace

To say to threaten, to menace politely in the present tense, use 위협해요 (wee-hyuh-pae-yoh). Below is the full conjugation of 위협하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
위협해
wee-hyuh-pae
위협해요
wee-hyuh-pae-yoh
위협합니다
wee-hyuh-pahm-nee-dah
Past
위협했어
wee-hyuh-pae-ssuh
위협했어요
wee-hyuh-pae-ssuh-yoh
위협했습니다
wee-hyuh-pae-sseum-nee-dah
Future
위협할 거야
wee-hyuh-pahl- -guh-yah
위협할 거예요
wee-hyuh-pahl- -guh-yae-yoh
위협할 겁니다
wee-hyuh-pahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
위협하세요
wee-hyuh-pah-sae-yoh
Suggestion / Let's Polite (요)
위협해요
wee-hyuh-pae-yoh
Question Polite (요)
위협해요?
wee-hyuh-pae-yoh-?
Connective “and” — (고)
위협하고
wee-hyuh-pah-goh
Conditional “if” — (면)
위협하면
wee-hyuh-pah-myuhn
Noun form — (기)
위협함
wee-hyuh-pahm