Disowning

verb

1. To refuse to own, or to refuse to acknowledge one’s own.

   "Lord Capulet and his wife threatened to disown their daughter Juliet if she didn’t go through with marrying Count Paris."

2. To repudiate any connection to; to renounce.
3. To detach (a job or process) so that it can continue to run even when the user who launched it ends his/her login session.