To make a serious decision to stop doing something:
Hindi meaning:शपथपूर्वक त्यागना
Synonyms: Renounce, Recant, Abjure, Repudiate
Antonyms: Accept, Allow, Approve, Acknowledge
Example: He would forswear all violence.
Trick to remember: Swear lena forswear lena ek hi baat hai.