renounce

give up, such as power, as of monarchs and emperors, or duties and obligations; "The King abdicated when he married a divorcee"

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"

turn away from; give up; "I am foreswearing women forever"

cast off; "She renounced her husband"; "The parents repudiated their son"