1. put an end to a state or an activity
同義詞：discontinue, stop, cease, give up, lay off
2. give up or retire from a position
同義詞：leave office, step down, resign
3. go away or leave
同義詞：depart, take leave
4. turn away from; give up
同義詞：foreswear, renounce, relinquish
5. give up in the face of defeat of lacking hope; admit defeat
同義詞：drop out, give up, fall by the wayside, drop by the wayside, throw in, throw in the towel, chuck up the sponge