renounce
verb.
give up, such as power, as of monarchs and emperors, or duties and obligations
The King abdicated when he married a divorcee
Synonym: abdicate
verb.
leave (a job, post, or position) voluntarily
She vacated the position when she got pregnant|The chairman resigned when he was found to have misappropriated funds
Synonym: give up, resign, vacate
verb.
turn away from; give up
I am foreswearing women forever
Synonym: foreswear, quit, relinquish
verb.
cast off
She renounced her husband|The parents repudiated their son
Synonym: disown, repudiate