- a large underground chamber, typically of natural origin, in a hillside or cliff（尤指天然形成的）洞穴。
派生词
cave-like
adjectivecaver
noun词源
Middle English: from Old French， from Latin cava, from cavus 'hollow' （compare with CAVERN）. The usage cave in may be from the synonymous dialect expression calve in, influenced by obsolete cave 'excavate， hollow out'.
短语动词
cave in（或cave something in）
1
- (with reference to a roof or similar structure) subside or collapse or cause something to do this（屋顶等）下陷, 坍塌, 倒塌; 使下陷, 使倒塌：
the ceiling caved in
天花板塌了
Len's club would have caved his skull in.
伦的棍子就可以把他脑袋打陷下去了。
1.1
- figurative yield or submit under pressure〈喻〉（在压力下）屈服, 屈从：
the manager caved in to his demands.
经理屈从了他的要求。
- Brit. school slang, dated look out〈英, 校园俚语, 旧〉当心！
短语
keep cave
- act as lookout望风。
词源
Latin， imperative of cavere 'beware'.