防ぼう浸しん

noun-modifying (irregular)

watertight; waterproof

Technical term used in engineering and product specifications, describing protection against water ingress. Often appears as a prenominal modifier (防浸の, 防浸構造).

• この時計とけいは防ぼう浸しん構こう造ぞうになっている。

  This watch has a watertight construction.

• 防ぼう浸しん性せい能のうを試し験けんする。

  Test the waterproof performance.