n (1)颌，颚(mouth-structure for biting or chewing)[C，常 pl]：the upper/lower～上/下颌;the～s of a crocodile/a shark 鳄鱼/鲨鱼的嘴部;

(2)下巴(lower part of the jaw)[C，常sing]：a strong square～结实的方下巴;break a boxer's～打裂拳击手的下巴;

(3)狭窄入口;(fig)危险的境遇(narrow entrance)[pl]：the～s of a gorge 峡谷口;be into/be out of/escape from the～s of danger(fig)进入/脱离/逃脱险境;

(4)钳牙(爪)(part of a tool or machine that grips or holds sth)[pl]：the～s of a very large wrench/vice 大扳手/虎钳的齿;

(5)长聊，闲扯，饶舌(long uninteresting talk;talkativeness)[C，U](infml);

one's jaw drops (infml)惊诧(失望)得张口结舌： Jack's～dropped when he won the prize. 杰克获奖时惊讶得张口结舌。

→′jaw-bone n 颌骨;′jaw-breaker n 难发音的词;[sl] 大块硬糖;

vi 喋喋不休，唠唠叨叨(talk at great length and in a boring way)[I，I+prep(at)(on)，I+adv(away)]：be～ing at sb about the new car 没完没了地对某人谈论新车;be～ing away for hours 闲聊数小时