1530s, from un- (1) "not" + pleasant (adj.). Related: Unpleasantly.
an unpleasant personality
unpleasant odors
unpleasant repercussions
unperceived
unpersuasive
unperturbed
unplace
unplanned
unpleasant
unpleasantness
unplug
unpolished
unpolluted
unpopular
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