So if you don't want to feel deceived or offended, think twice before you decide to go shopping.

deceived 是动词 deceive 的过去分词形式，在句中表示被动。deceive 由前缀 de-（表示"相反"）和词根 -ceive（来自拉丁语 capere，意为"拿取"）组成，字面意思是"拿取相反的东西"，引申为"欺骗、蒙骗"的意思。deceived 表示"被欺骗"的状态。