防ぼう水すい扉ひMeanings1nounwatertight doorA 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.
