adjective Date: 14th century of such tight construction or fit as to be impermeable to water except when under sufficient pressure to produce structural discontinuity, leaving no possibility of misconstruction or evasion , ~ness noun
WATERTIGHT
Meaning of WATERTIGHT in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012