free reinWiktionary 原文英/ˌfriː ˈreɪn/美/ˌfri ˈreɪn/构词拆解free词干+rein词干词源说明From free (adjective) + rein.释义名词noun1(equestrianism) A rein of a horse held loosely so that the animal can move more freely; also, the free condition that this gives to a horse.2