betrays

1. reveal unintentionallyExamples: "Her smile betrayed her true feelings"Synonyms: betray, bewray

2. deliver to an enemy by treacheryExamples: "Judas sold Jesus"; "The spy betrayed his country"Synonyms: betray, sell

3. disappoint, prove undependable to; abandon, forsakeExamples: "His sense of smell failed him this time"; "His strength finally failed him"; "His children failed him in the crisis"Synonyms: betray, fail

4. be sexually unfaithful to one's partner in marriageExamples: "She cheats on her husband"; "Might her husband be wandering?"Synonyms: betray, cheat, cheat on, cuckold, wander

5. give away information about somebodyExamples: "He told on his classmate who had cheated on the exam"Synonyms: betray, denounce, give away, grass, rat, shit, shop, snitch

6. cause someone to believe an untruthExamples: "The insurance company deceived me when they told me they were covering my house"Synonyms: betray, deceive, lead astrayAntonyms: undeceive