be as stubborn as a mule
US /bi æz ˈstʌbərn æz ə mjuːl/
UK /bi æz ˈstʌbərn æz ə mjuːl/

1.
keras kepala seperti keledai, sangat keras kepala
to be very stubborn and unwilling to change one's mind or opinion
:
•
You can try to convince him, but he'll be as stubborn as a mule.
Kamu bisa mencoba meyakinkannya, tapi dia akan keras kepala seperti keledai.
•
My grandfather used to be as stubborn as a mule when it came to new technology.
Kakek saya dulu keras kepala seperti keledai dalam hal teknologi baru.