This is the 5059th most frequent Japanese word.
裏切ら
"裏切ら" means "to betray."
The word '裏切った' here refers to the act of betrayal, implying a breach of trust or loyalty within a relationship.
彼は友人を裏切った。
He betrayed his friend.
In this sentence, '裏切る' is used to denote acting against or violating terms or agreements.
その会社は契約を裏切る行動を取った。
The company took actions that betrayed the contract.
Here, '裏切らない' means to not betray, often implying living up to or fulfilling someone's expectations.