She clearly overstated the facts when describing that minor accident.

overstated 是动词 overstate 的过去式形式。overstate 由前缀 over-（表示"过度、超过"）和动词 state（陈述、说明）组成，意思是"夸大其词、言过其实"。overstated 表示"夸大了"的意思。