obstinate

jästipäinen

itsepäinen

uppiniskainen

olla järkähtämätön stubborn Stubbornly adhering to an opinion, purpose, or course, usually with implied unreasonableness; persistent.
1686, w:Michel de Montaigne|Montaigne, translated by w:Charles Cotton|Charles Cotton, "That men are justly punished for being obstinate in the defence of a fort that is not in reason to be defended",

From this consideration it is that we have derived the custom, in times of war, to punish (..) those who are obstinate to defend a place that by the rules of war is not tenable (..)

Now it happened that Kasturbai (..) had again begun getting haemorrhage, and the malady seemed to be obstinate.