He exhibited great confidence during his speech.

exhibited 是动词 exhibit 的过去式。exhibit 由前缀 ex-（表示"向外"）和词根 hibit（来自拉丁语 habere，意为"持有"）组成，字面意思是"向外展示持有的东西"，引申为"展示、展现、表现"的意思。