watertight

• 形容某物密封不透水；也用于比喻指论证、计划等严密无懈可击，无可挑剔。

Describes something that is sealed so that water cannot enter or escape; also used figuratively to describe an argument or plan that is flawless and cannot be disputed.

1. Impermeable to waterB1formal

   Constructed or sealed so that water cannot enter or escape.

   防水的

   • The submarine's hull is completely watertight.
   • Make sure the container is watertight before storing the liquid.
   • The new watch has a watertight seal up to 100 meters.

   同义词impermeableleakproofsealedwaterproof

   反义词leakypermeableporous

2. Without flaws or loopholesB2formal

   Describes an argument, plan, or legal case that is perfectly logical and cannot be disproven or avoided.

   无懈可击

   • The prosecutor presented a watertight case against the defendant.
   • We need a watertight contract to avoid any future disputes.
   • His alibi was watertight, so the police had to release him.

   同义词airtightbulletprooffoolproofimpregnableironcladrigoroussoundunassailable

   反义词faultyflawedlooserefutableshakyunsoundvulnerableweak