drownproofWiktionary 原文构词拆分drown词根/词干+-proof后缀Added to a noun to form an adjective denoting imperviousness to that noun. · Added to a noun to form a verb denoting a process to make something impervious to that noun.词源说明From drown + -proof.释义（英文）动词 Verb(transitive) To train (a person) to float in water without sinking or drowning, occasionally raising the mouth above the surface to take a breath.