root for someone
phrasal verb with root verb uk/ruːt/ us/ruːt/
informal
给（某人）以支持，为（某人）助威，声援（某人）
to show support for someone who is doing something difficult
Good luck! We're all rooting for you. 祝你好运！我们都支持你。
B1 mainly US (UK usually support)支持（某个运动队或运动员）
to support a sports team or a sports player and want them to win
Who do you root for in the Super Bowl? 超级碗大赛你支持谁？