cohabitation

[ˌkəʊˌhæbɪˈteɪʃn]

释义

n. 同居
the state or condition of living together as husband and wife without being married

例句
Sheldon: Cohabitation with my girlfriend? That's a great deal to process. (The Big Bang Theory)
谢尔顿：和女朋友同居？这可是件大事啊。（生活大爆炸）