that does not allow water to get in or out 不透水的;防水的;水密的 a watertight container 不漏水的容器 The roof has been made watertight. 屋顶已经做了防水处理。
Extra ExamplesThe containers should remain watertight. 容器应该保持不漏水。 The trouble is that the inner seal is not completely watertight. 问题是内密封不完全防水。
(of an excuse, a plan, an argument, etc. )借口、计划、论点等 carefully prepared so that it contains no mistakes, faults or weaknesses 严密的;无懈可击的;天衣无缝的