1640s, from un- (1) "not" + satisfactory (adj.). Related: Unsatisfactorily; unsatisfactoriness.
her performance proved to be unsatisfactory
shops should take back unsatisfactory goods
our discussion was very unsatisfactory
unsafe
unsaid
unsalted
unsanitary
unsatiable
unsatisfactory
unsatisfied
unsaturated
unsavory
unscathed
unschooled
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