verb
reveal unintentionally
Synonyms
Examples
- Her smile betrayed her true feelings
verb
deliver to an enemy by treachery
Synonyms
Examples
- Judas sold Jesus
- The spy betrayed his country
verb
disappoint, prove undependable to
Synonyms
Examples
- abandon, forsake
- His sense of smell failed him this time
- His strength finally failed him
- His children failed him in the crisis
verb
be sexually unfaithful to one's partner in marriage
Synonyms
Examples
- She cheats on her husband
- Might her husband be wandering?
verb
give away information about somebody
Synonyms
Examples
- He told on his classmate who had cheated on the exam
verb
cause someone to believe an untruth
Synonyms
Examples
- The insurance company deceived me when they told me they were covering my house