Definition: to behave in a dishonest or cruel way to someone who trusts you Level: B2
她因母亲缺乏支持而感到背叛。
She felt ___betrayed by her mother's lack of support.
他承诺永不背叛她。
He promised never to ___betray her.
他无法相信他最好的朋友背叛了他。
He couldn't believe that his best friend had ___betrayed him.
