cohabit

动词 cohabit:

1. room or live together; usually said of people who are not married and live together as a couple
   同义词：shack up

1. They were cohabiting for three years before their marriage.
   他们同居了三年才结婚。

co.hab.it

v.intr.（不及物动词）
co.hab.it.ed,co.hab.it.ing,co.hab.its
To live together as spouses.
同居：象配偶一样住在一起
To live together in a sexual relationship when not legally married.
未婚同居：无法定婚姻住在一起，有性关系

来源：
Late Latin cohabit3re
后期拉丁语 cohabit3re
Latin co- [co-]
拉丁语 co- [前缀，表.相互，一起.]
Latin habit3re [to dwell] * see inhabit
拉丁语 habit3re [居住] *参见 inhabit

【引伸】
cohab.itant 或
cohab.iter
n.（名词）
cohab.ita.tion
n.（名词）
cohab.ita.tional
adj.（形容词）