Renounce

verb
give up, such as power, as of monarchs and emperors, or duties and obligations
“The King abdicated when he married a divorcee”
Similar: abdicate
verb
leave (a job, post, or position) voluntarily
“She vacated the position when she got pregnant”
Similar: vacate, resign, give up
verb
turn away from; give up
“I am foreswearing women forever”
Similar: foreswear, quit, relinquish
verb
cast off
“She renounced her husband”
Similar: disown, repudiate