1560s, "incapable of being shaped," from un- (1) "not" + fashionable. Meaning "not in accordance with prevailing fashion" is attested from 1640s. Related: Unfashionably.
unfashionable clothes
melodrama of a now unfashionable kind
unfairness
unfaithful
unfaltering
unfamiliar
unfamous
unfashionable
unfasten
unfathomable
unfathomed
unfavorable
unfazed
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