1. 不透气的：airtight work 气密操作 | airtight 不透气的 | airtight 气密的
2. 密封的：airstrip 飞机跑道 | airtight 密封的 | airward 向上地
3. 气密的：airtight 不透气的 | airtight 气密的 | airtightness 气密性
4. 气密：airthrottle 节气门 | airtight 气密 | airtight 气密的
1. 不透气的；气密的；密封的
If a container is airtight, its lid fits so tightly that no air can get in or out.
e.g. Store the cookies in an airtight tin.
将曲奇饼干存放于密封罐中。
2. （不在场证据或案件、契约、论据）无懈可击的，没有漏洞的，严密的
An airtight alibi, case, argument, or agreement is one that has been so carefully put together that nobody will be able to find a fault in it.
e.g. Mick had an airtight alibi.
米克有确凿的不在场证据。