分居
fēn jū
(of members of a family) live apart; separate without a legal divorce (of husband and wife):
分居两处 live in two separate places
他俩才结婚一年就分居了。 They split up after a year of marriage.
分居往往是离婚的前奏。 The separation of a couple often leads to divorce.
divorce from bed and board; divorce a mensa et thoro; Legally Separated
divorce from bed and board