(not) in the least; (not) at all; (not) a bit
訴える気は毛頭ない。
I have absolutely no intention of suing.
彼を傷つけるつもりは毛頭なかった。
I never had any intention of hurting him.
妥協する考えなど毛頭ないと宣言した。
He declared that he had not the slightest thought of compromising.