1. (

• betray ,
• bewray

) reveal unintentionally; "Her smile betrayed her true feelings" ;

2. (

• betray ,
• sell

) deliver to an enemy by treachery; "Judas sold Jesus"; "The spy betrayed his country" ;

3. (

• fail ,
• betray

) disappoint, prove undependable to; abandon, forsake; "His sense of smell failed him this time"; "His strength finally failed him"; "His children failed him in the crisis" ;

4. (

• cheat_on ,
• cheat ,
• cuckold ,
• betray ,
• wander

) be sexually unfaithful to one's partner in marriage; "She cheats on her husband"; "Might her husband be wandering?" ;

5. (

• denounce ,
• tell_on ,
• betray ,
• give_away ,
• rat ,
• grass ,
• shit ,
• shop ,
• snitch ,
• stag ,

) give away information about somebody; "He told on his classmate who had cheated on the exam" ;

6. (

• deceive ,
• betray ,
• lead_astray

) cause someone to believe an untruth; "The insurance company deceived me when they told me they were covering my house" ;