The bad weather didn't deter him from his daily morning run.

deter 是动词，由前缀 de-（表示"离开、去除"）和词根 ter（来自拉丁语 terrere，意为"使害怕"）组成，意思是"阻止、威慑、使不敢"。在句中表示"恶劣天气没能使他放弃晨跑"。