obdurate in Dutch
obdurate in Dutch
koppig
Stubbornly persistent, generally in wrongdoing; refusing to reform or repent.
hardleers
Stubbornly persistent, generally in wrongdoing; refusing to reform or repent.
onverzettelijk
Stubbornly persistent, generally in wrongdoing; refusing to reform or repent.
weerbarstig
Stubbornly persistent, generally in wrongdoing; refusing to reform or repent.
keihard
(obsolete) Physically hardened, toughened.