betray someone
be unfaithful
act deceitfully
break trust
1. He was heartbroken to discover that his closest friend had played him false.
当他发现最亲近的朋友背叛了他时，他心碎了。
2. She feared that his sudden change in attitude meant he was playing her false.
她担心他态度的突然变化意味着他在欺骗她。
3. They promised to stay loyal, but in the end, they played him false.
他们曾承诺保持忠诚，但最终还是背叛了他。
A: Why did you do that? I thought we were friends.
A：你为什么要那样做？我以为我们是朋友。
B: I'm sorry, I didn't mean to play you false, but I had no choice.
B：对不起，我并不想背叛你，但我别无选择。
1) To act in a deceitful manner
2) To betray someone's trust
3) To be unfaithful to a person or cause
1. 背叛，欺骗
e.g.He felt that his partners had played him false.
他觉得他的合伙人背叛了他。
idiom
1. To act in a deceitful or disloyal manner; to betray someone.
Synonym: betray, deceive, double-cross