abandon one's country or cause in favor of an opposing one.
he defected to the Soviet Union after the war
同义词：
desertgo over to the enemychange sides/loyalties/allegiancesturn traitorrebelrenegeabscondgo AWOLquitescapeshift groundbreak faithbe apostateapostatizeabandonrenouncerepudiatesecede fromrevolt againstarchaic：forsakeinformal：rat onrare：tergiversate
