v. 对…不忠( betray的过去式和过去分词 ); 背叛; 出卖; 泄露

v reveal unintentionally

v deliver to an enemy by treachery

v disappoint, prove undependable to; abandon, forsake

v be sexually unfaithful to one's partner in marriage

v give away information about somebody

v cause someone to believe an untruth