underwingWiktionary 原文构词拆分under词根/词干+wing词根/词干词源说明From under + wing.释义（英文）名词 NounA hind wing on an insect.A member of the genus Catocala, a nocturnal moth which usually has brightly coloured underwings.(ornithology) The underside of a bird's wing.词族派生词（4）white underwingdark crimson underwingpink underwingsleepy underwing