the act of betraying someone or something

a person or act that betrays

धोखेबाज़

English Usage: She felt that he was a betrayal to their cause.

Hindi Usage: उसे लगा कि वह उनके कारण के लिए एक धोखेबाज़ था।

to reveal or make known something, often unintentionally

to violate the trust or confidence of someone

विश्वास तोड़ना

English Usage: She felt he would betray her if he got the chance.

Hindi Usage: उसे महसूस हुआ कि अगर उसे मौका मिला, तो वह उसका विश्वास तोड़ देगा।