undertailWiktionary 原文英美构词拆解underunder-前缀tailtail词干under-Beneath, under · (figurative) To go from one side to the other; to progress along a path词源说明From under- + tail.释义形容词adjective1Beneath a tail.2On the underside of the tail.名词noun1(ornithology) The ventral part of the tail of a bird.2The underside of a tail.同族词