not harm/touch a hair of somebody's head

not touch a hair on (one's) head

To not hurt or injure someone in even the slightest degree. They had better not touch a hair on your head, or I'll go to the police!See also: hair, head, not, on, touch

not harm/touch a hair of somebody’s ˈhead

not hurt somebody physically in any way at all: If he harms a hair of my daughter’s head, I’ll kill him.See also: hair, harm, head, not, of, touch