形容词
1. 未做的；未完成的
Work that is undone has not yet been done.
2. see also: undo
1. not done
e.g. the work could be done or undone and nobody cared
2. thrown into a state of disorganization or incoherence
e.g. price programs became unstuck because little grain was available
Synonym: unstuck
3. not fastened or tied or secured
e.g. her blouse had come undone at the neck
his shoelaces were undone
4. doomed to extinction