estrange

v. (-ging) 1 (usu. In passive; often foll. By from) alienate; make hostile or indifferent. 2 (as estranged adj.) (of a husband or wife) no longer living with his or her spouse.  estrangement n. [latin: related to *strange]

v. t. To withdraw; to withhold; hence, reflexively, to keep at a distance; to cease to be familiar and friendly with.