extremity

极端；绝境；非常手段；手足英释中释nthe degree to which something goes beyond what is usually thought to be acceptable

1 lower extremity,下肢

2 upper extremity,上肢

3 the last extremity,极大的危险(或不幸消息)

1 The committee was uncomfortable about the extremity of the proposal..委员会因该建议太极端而感到不安。