give one his head

• 让某人自由行动；不约束某人；自行其是

give one his head的用法和样例：

例句

1. We mustn't leave him to his own devices.
   不应听任他去自行其是。
2. But he'll have his own way in the end,you mark my words.
   你记住我的话，他最终还是会自行其是的。