"left without indication of date," 1560s, from un- (1) "not" + past participle of date (v.1) "assign a date to." Compare similarly formed German undatirt, Dutch ongedateerd, Swedish odaterad.
uncultivated
uncurbed
uncurious
uncurl
uncut
undated
undaunted
undaunting
undead
undeceive
undeceived
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