What's the 'harm' in letting her leave early? = I don't see any 'harm' in letting her leave early. = There's no 'harm' in letting her leave early. [=letting her leave early will not hurt anyone or cause a bad result]
I want to be sure that no 'harm' will come to her. = I want to be sure that she won't come to any 'harm'. [=that she won't be hurt in any way]
He claims that he didn't mean any 'harm'. [=that he didn't mean to hurt or bother anyone]
(..) They are about to graduate. They are about to marry. They are only some boys, they are silly. All that you/they know is of its innocence, they will never harm to anybody I want to run to them and to tell them: "Give birth to!" Don't make it. She is the mistaken woman. He is the mistaken man. (..)2007 Into the Wild