Verbseoul.
하다 verb (adj)
밋밋하다mitmithadato be plain, to be dull, to be bland

To say to be plain, to be dull, to be bland politely in the present tense, use 밋밋해요 (meen-mee-tae-yoh). Below is the full conjugation of 밋밋하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
밋밋해
meen-mee-tae
밋밋해요
meen-mee-tae-yoh
밋밋합니다
meen-mee-tahm-nee-dah
Past
밋밋했어
meen-mee-tae-ssuh
밋밋했어요
meen-mee-tae-ssuh-yoh
밋밋했습니다
meen-mee-tae-sseum-nee-dah
Future
밋밋할 거야
meen-mee-tahl- -guh-yah
밋밋할 거예요
meen-mee-tahl- -guh-yae-yoh
밋밋할 겁니다
meen-mee-tahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
밋밋하세요
meen-mee-tah-sae-yoh
Suggestion / Let's Polite (요)
밋밋해요
meen-mee-tae-yoh
Question Polite (요)
밋밋해요?
meen-mee-tae-yoh-?
Connective “and” — (고)
밋밋하고
meen-mee-tah-goh
Conditional “if” — (면)
밋밋하면
meen-mee-tah-myuhn
Noun form — (기)
밋밋함
meen-mee-tahm