Unbecoming, a.
Etymology: [Pref. un- not + becoming.]
Not becoming; unsuitable; unfit; indecorous; improper. My grief lets unbecoming speeches fall. Dryden. -- Un`be*com"ing*ly, adv. -- Un`be*com"ing*ness, n.
Shades of meaning
Fernald lists unbecoming only as an antonym, under becoming.
He lists it without comment; the entries above explain its neighbors.
Synonyms
none given