She got tired of being treated as a plaything and decided to end the relationship.

plaything 是由动词 play（玩耍）和名词 thing（东西）组成的复合词，字面意思是"玩的东西"，引申为"玩具"或"被玩弄的对象"。 在比喻用法中，plaything 常带有贬义，指被他人随意摆布、不尊重的对象。