I. |ən|dən adjective
Etymology: Middle English undon, undoon, from un- (I) + don, doon done — more at done
: not done
a task undone
II. adjective
Etymology: Middle English undon, undoon, from past participle of undon, undoon to undo — more at undo
1. : destroyed, ruined
a mind undone
2. : unfastened
his package came undone while passing through the New York post office — Jane Shellhase