betray
US /bɪˈtreɪ/
UK /bɪˈtreɪ/

1.
2.
背叛
to be disloyal to (one's country, a person, or an organization) by disclosing secrets or otherwise aiding an enemy
:
•
He was accused of betraying his country.
他被指控背叛了他的國家。
•
She felt betrayed by her closest friend.
她感到被她最親密的朋友背叛了。