She quickly dismissed his suggestion without giving it any thought.

dismissed 是动词 dismiss 的过去式。dismiss 由前缀 dis-（表示"离开、分开"）和词根 miss（来自拉丁语 mittere，意为"发送"）组成，字面意思是"发送离开"，引申为"驳回、不予考虑"或"解雇、解散"的意思。在句中表示"拒绝接受或考虑"的意思。