防ぼう水すい扉ひ

noun

watertight door

A door designed to prevent water from passing through, used in ships, flood barriers, and waterproof compartments.

• 船ふねの防ぼう水すい扉ひは、浸しん水すいを防ふせぐために閉しめられた。

  The ship's watertight doors were closed to prevent flooding.