bigamy
n.
"state of having two wives or husbands at the same time," mid-13c., from Old French bigamie (13c.), from Church Latin bigamia, from Late Latin bigamus "twice married," a hybrid from bi- "double" (see bi-) + Greek gamos "marrying" (see gamete). The Greek word was digamos "twice married."
Bigamie is unkinde ðing, On engleis tale, twie-wifing. [c.1250]
In Middle English, also of two successive marriages or marrying a widow.〔李〕[bi-=two 二；gam=marriage 婚姻；-y n.=the state of…的状态⇒“the state of keeping two marriages at the same time 同时维持两个婚姻关系的状态”→] n. the practice of having two wives or two husbands at the same time 重婚
〔李〕[bi-;gam;-yn.] n.重婚（罪） ←gam (GK gamos)=marriage 婚姻
〔蒋〕[bi-双，重，gam婚姻，-y名词后缀] 重婚(罪)