Verbseoul.
하다 verb (adj)
희한하다huihanhadato be rare or unusual

To say to be rare or unusual politely in the present tense, use 희한해요 (hui-hahn-hae-yoh). Below is the full conjugation of 희한하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
희한해
hui-hahn-hae
희한해요
hui-hahn-hae-yoh
희한합니다
hui-hahn-hahm-nee-dah
Past
희한했어
hui-hahn-hae-ssuh
희한했어요
hui-hahn-hae-ssuh-yoh
희한했습니다
hui-hahn-hae-sseum-nee-dah
Future
희한할 거야
hui-hahn-hahl- -guh-yah
희한할 거예요
hui-hahn-hahl- -guh-yae-yoh
희한할 겁니다
hui-hahn-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
희한하세요
hui-hahn-hah-sae-yoh
Suggestion / Let's Polite (요)
희한해요
hui-hahn-hae-yoh
Question Polite (요)
희한해요?
hui-hahn-hae-yoh-?
Connective “and” — (고)
희한하고
hui-hahn-hah-goh
Conditional “if” — (면)
희한하면
hui-hahn-hah-myuhn
Noun form — (기)
희한함
hui-hahn-hahm