After a series of poor results, the star player decided to withdraw from the tournament.

withdraw 是动词，由前缀 with-（表示"向后、离开"）和动词 draw（拉、拖）组成，字面意思是"向后拉"，引申为"撤回、退出"的意思。在句中表示"从比赛中退出"这个动作。