forswear:

to make a serious decision to stop doing something, to renounce earnestly

forswear:

to make a serious decision to stop doing something, to renounce earnestly

(Verb)

Example Sentences:

Ramayana:  After seeing Rama’s fearsome power in punishing demons, Maricha forswore all demoniac actions.

Mahabharata:  A lesser-known reason for Krishna’s being a non-combatant in the Kurukshetra war is that he had forsworn all use of weapons after killing the demon Dantavakra.

Bhagavad-gita:  Unless we forswear sensual pleasures, we can’t have the steady focus to realize spiritual truths, leave alone relish them (2.44).