He dissipated all his savings on casinos and luxury cars within just two years.

dissipated 是动词 dissipate 的过去式。dissipate 由前缀 dis-（表示"分散、分开"）和词根 sipare（拉丁语，意为"扔、撒"）组成，本义是"使消散、驱散"。引申为"挥霍、浪费"，指将钱财等资源分散消耗掉。