betray

Synonyms: abandon be unfaithful bite the hand that feeds you blow the whistle bluff break faith break promise break trust break with commit treason cross deceive deliver up delude desert double-cross finger forsake go back on inform against inform on jilt knife let down mislead play false play judas seduce sell down the river sell out stab in the back take in trick turn in turn informer turn state’s evidence walk out on

Antonyms: be faithful be loyal defend protect support

Synonyms: blurt out dime disclose evince fink on give away inform lay bare let slip make known manifest rat on reveal show sing snitch spill squeal stool tattle tell tell on turn in uncover unmask

Antonyms: be quiet hide keep secret