金槌頭 (かなづちあたま) Japanese meaning | KotomoraMeanings
1
noun
hard-headed; stubborn
Describes a person who is obstinate and refuses to change their mind; literally 'hammer head'. Often used in a critical or exasperated tone.
金
槌
頭
を
説
得
する
の
は
無
理
だ
。
It's impossible to persuade that stubborn mule.