(mining) Synonym of afterdamp (“suffocating gases present in a coal mine after an explosion caused by firedamp”)

Alternative spelling of stanch (“a floodgate by which water is accumulated, for floating a boat over a shallow part of a stream by its release; also, a dam or lock in a river”)

Alternative spelling of stanch

An adjective "staunch" represents something that is not allowing water or other liquids to escape or enter, and can also refer to something that is impermeable to air or other gases.

Strongly built; also, in good or strong condition.

(figurative) Staunch is an adjective that describes someone or something as firm, resolute, dependable, loyal, reliable, and trustworthy.