This is the 14224th most frequent German word.
hartnäckige
Persistent or stubborn.
In this sentence, 'hartnäckige' is used as an adjective to describe the noun 'Krankheit', emphasizing its persistent and resistant nature.
Die hartnäckige Krankheit verschwand erst nach langer Behandlung.
The persistent illness disappeared only after a long treatment.
Here, 'hartnäckiger' modifies 'Versuch', characterizing the determined and relentless effort.
Sein hartnäckiger Versuch, das Problem zu lösen, beeindruckte alle.
His persistent attempt to solve the problem impressed everyone.
The term 'hartnäckig' is used as an adjective in complement position to describe a person's unwavering stance or determination.