This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

v. Present participle of misbecome.

adj. Unbecoming.

n. An improper act; indecorous conduct.

Unbecoming; unseemly; improper; indecorous.

"Flights borrow no Graces from Detraction; you never speak a misbecoming Word, nor do an ill-natur'd Action, tho ''tis always in your Power."

unbecoming   

misbecome