He arrived late every day and was eventually dismissed.

dismissed 是动词 dismiss 的过去分词形式，dismiss 由前缀 dis-（表示"离开、分开"）和词根 miss（源自拉丁语 mittere，意为"发送"）组成，字面意思是"发送离开"，引申为"解雇、开除"的意思。 在句中 was dismissed 构成被动语态，表示"被解雇"的意思。