The sound of his phone notifications distracted him from his work.

distracted 是动词 distract 的过去式，distract 由前缀 dis-（表示"分开、分离"）和词根 tract（"拉、拖"）组成，字面意思是"把注意力拉走"，即"使分心、分散注意力"。 在句中表示手机通知的声音把他的注意力从工作中拉走了。