1
be watertight
作表语，表示某物不漏水。
The seal is watertight.
这个密封是防水的。
防水的；不透水的
先理解核心含义，再看它在真实句子里的用法。
防水的；不透水的
So tightly made that water cannot enter or escape.
The seal is watertight.
这个密封是防水的。
制作严密,水不能进入或漏出。
So tightly made that water cannot enter or escape.
不透水的；防水的
not allowing water to pass in or out
设计或计划得无法被击败、规避或废除。
So devised or planned as to be impossible to defeat, evade or nullify.
无漏洞的；无懈可击的
without flaws or loopholes
The new raincoat is made of watertight fabric, so you'll stay dry in the storm.
这件新雨衣由防水面料制成，所以你在暴风雨中会保持干爽。
AI contextual example
Before the dive, the instructor checked that the underwater camera case was completely watertight.
潜水前，教练检查了水下相机外壳是否完全密封防水。
AI contextual example
The engineer designed a watertight seal for the pipe to prevent any leakage.
工程师为管道设计了一个密封防水的接口，以防止任何泄漏。
AI contextual example
a watertight alibi
一个无懈可击的不在场证明。
WordNet
作表语，表示某物不漏水。
The seal is watertight.
这个密封是防水的。
作定语，修饰名词，表示该物体防水。
a watertight container
一个防水的容器
比喻用法，表示论点或计划等完美无缺，没有漏洞。
a watertight argument
一个无懈可击的论点
Not this
This is a watertight.
Use this
This is watertight.
watertight 是形容词，不能直接用作名词。"a watertight" 缺少被修饰的名词，应改为形容词表语。
Not this
We watertight the container.
Use this
We make the container watertight.
watertight 是形容词，不是动词。表达“使...不透水”需用 "make ... watertight" 结构。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
防水密封条
Make sure the watertight seal on the jar is intact before storing the food.
存放食物前，请确保罐子上的防水密封条完好无损。
水密隔舱
The submarine has several watertight compartments to protect against flooding.
潜艇有几个水密隔舱以防进水。
无懈可击的论点
Her watertight argument left no room for doubt.
她的论点无懈可击，毫无质疑空间。
无懈可击的不在场证明
The suspect's watertight alibi proved he was not at the scene.
嫌疑人的不在场证明天衣无缝，证明他不在现场。
无懈可击的案情
The lawyer built a watertight case that the jury could not ignore.
律师建立了一个无懈可击的案情，陪审团无法忽视。
万无一失的计划
They spent months designing a watertight plan for the expedition.
他们花了数月时间为这次远征设计了一个万无一失的计划。
无懈可击的不在场证明
She had a watertight alibi, so the police had to let her go.
她有不在场证明，且无懈可击，警方只好放了她。
无懈可击的论据
The lawyer presented a watertight case against the defendant.
律师提出了针对被告的无懈可击的证据。
无懈可击的论点
His watertight argument convinced even the skeptics.
他无懈可击的论点甚至说服了怀疑者。
关上水密门。
The Titanic had watertight compartments, but five flooded and the ship sank.
泰坦尼克号有水密隔舱，但有五个舱室进水，船还是沉了。
发长 /aɪ/ 音 (如 high, light)
Same pattern, same sound
Use watertight naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
水（water）都进不去，像密封舱一样严密；计划也滴水不漏，无懈可击。
语域：mixed 常见场景：造船与防水设备、法律或逻辑辩论 watertight 本义指“不透水的、防水的”，多用于造船、建筑或防水产品的说明，属于中性表达；引申义指“无懈可击的、无漏洞的”，比较常见于法律、合同、逻辑论证等正式书面语境。总体正式程度会随使用场景变化，口语中通常不用此词。
通常用于描述容器、盒子或设计等不透水。
Dictionary facts from ECDICT, WIKTIONARY.