watertight bulkhead水密舱壁
watertight test水密检验;水密试验;密性试验
watertight a严密的;不透水的;不透水的防水的;不漏水的
watertight subdivision水密舱区;[船] 水密分舱;水密舱区划分;水密分舱
watertight riveting水密铆合;水密铆
watertight motor不透水型电动机;水密式电动机
Watertight deck水密甲板
watertight receptacles防水容器;水密容器
ADJ（形容词） Something that is watertight does not allow water to pass through it, for example, because it is tightly sealed. 不透水的
The flask is completely watertight, even when laid on its side.
这水瓶即使平放也不漏一滴水。
ADJ（形容词） A watertight case, argument, or agreement is one that has been so carefully put together that nobody will be able to find a fault in it. (事实、论点、协议等) 严密的; 无懈可击的 [英国英语]
If she could just establish the time the picture had been taken, Mick would have a watertight alibi.
只要她能确定拍这张照片的时间，米克就可以有一个无懈可击的不在现场的证据。