"not accomplished," c. 1300, from un- (1) "not" + done. The same word meaning "destroyed" is recorded from mid-14c., past-participle adjective from undo.
the work could be done or undone and nobody cared
her blouse had come undone at the neck
his shoelaces were undone
undivided
undivulged
undo
undocumented
undomesticated
undone
undoubtable
undoubted
undreamed
undress
undressed
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