the quality of being very determined

अडिगता

English Usage: Her tenacity in pursuing her goals was admirable.

Hindi Usage: उसकी लक्ष्यों की प्राप्ति में अडिगता सराहनीय थी।

not letting go of or giving up on something

संयुक्त

English Usage: He was tenacious in his efforts to improve his skills.

Hindi Usage: वह अपनी क्षमताओं को सुधारने के प्रयास में संयुक्त था।