undone adj.
1 not fastened or tied
VERBS be | come My button's come undone again. | get sth I can't get this knot undone.
2 not done
VERBS be | remain | leave sth We left the washing-up undone and went out for the day.
You can also check other dicts: undone (English, 中文解释 ), wordnet sense, Collins Definition