droopWiktionary 原文中文来自 ECDICTvi.下垂，消沉vt.使下垂n.低垂，消沉演变路径（由近及远）英语继承自 ←中古英语 droupen源自 ←古诺尔斯语 drúpa “to droop”源自 ←原始日耳曼语 *drūpaną源自 ←原始印欧语 *dʰrewb- “to drip, drop”词源说明Inherited from Middle English droupen, from Old Norse drúpa (“to droop”), from Proto-Germanic *drūpaną, *drupōną (“to hang down, drip, drop”), from Proto-Indo-European *dʰrewb- (“to drip, drop”). Doublet of drip and drop.释义（英文）动词 Verb(intransitive) To hang downward; to sag.(intransitive) To slowly become limp; to bend gradually.(intransitive) To lose all energy, enthusiasm or happiness; to flag.(transitive) To allow to droop or sink.(intransitive, figurative) To proceed