hartnäckig — meaning in English

English meaning

adamant adj Refusing to change one's mind or position; firmly determined.
dogged adj Persistent and determined, refusing to give up despite difficulty.
feisty adj Full of spirit and energy; not afraid to stand up for oneself.
indelible adj Impossible to remove, erase, or wash away.
obdurate adj Stubbornly refusing to change your bad behavior or feel sorry for it.
obstinate adj Refusing to change one's opinion or course of action, often unreasonably so.
persistent adjective Continuing firmly despite difficulty or opposition; refusing to give up.
pertinacious adj Refusing to give up an opinion or aim, holding firmly onto it.
recalcitrant adjective Stubbornly refusing to obey authority, follow rules or cooperate, even under pressure.
tenacious adjective Refusing to give up or let go, even when things get difficult.

hartnäckig is used for these senses in English:

adamant (said of people and their conviction) Firm; unshakeable; unyielding; determined.
dogged stubbornly persevering, steadfast
feisty Tenacious, energetic, spunky.
indelible Having the quality of being difficult to delete, remove, wash away, blot out, or efface.
obdurate Stubbornly persistent, generally in wrongdoing; refusing to reform or repent.
obstinate Stubbornly adhering to an opinion, purpose, or course, usually with implied unreasonableness; persistent.
obstinate (of inanimate things) Not easily subdued or removed.
persistent Obstinately refusing to give up or let go.

adj Refusing to change one's mind or position; firmly determined.
noun A legendary stone or mineral once believed to be unbreakable, historically linked to diamond or lodestone.