fluid-bondedWiktionary 原文英美构词拆解fluid词干+bond词干+-ed后缀-edUsed to form past tenses of (regular) verbs. In linguistics, it is used for the base form of any past form. See -t for a variant.词源说明From fluid + bond + -ed.释义形容词adjective1said of two or more peopleUnder agreement to have unprotected sex exclusively with each other.