Verb: betray bi'trey
- Reveal unintentionally
"Her smile betrayed her true feelings";
- bewray [archaic]
- Deliver to an enemy by treachery
"The spy betrayed his country";
- sell
- Disappoint, prove undependable to; abandon, forsake
"His sense of smell betrayed him this time";
- fail
- Be sexually unfaithful to one's partner in marriage
"She betrays her husband";
- cheat on, cheat, cuckold, wander
- Inform on someone to authorities or others in power
"He betrayed his classmate who had cheated on the exam";
- denounce, tell on, give away, rat [informal], grass, shop [informal], snitch [informal], stag, squeak [informal]
- Cause someone to believe an untruth
"The misleading advertisement betrayed consumers";
- deceive, lead astray
Derived forms: betraying, betrayed, betrays
Type of: break, bring out, cozen [literary], deceive, delude, disappoint, disclose, discover, disinform, divulge, expose, give away, inform, lay bare, lead on, let down, let on, let out, misinform, mislead, reveal, uncover, unwrap
Antonym: undeceive
Encyclopedia: Betray