in-law

名词 in-law:

1. a relative by marriage
   同义词：relative-in-law

in-law

n.（名词）
A relative by marriage.
姻亲：婚姻关系形成的亲属

来源：
Back-formation from such compounds as mother-in-law
源自如复合词 mother-in-law的逆构词