relinquish

CEFR: C1-C2 /re-lin-quish/ [r.ih0.l.ih1.ng.k.w.ih0.sh]

Definition: turn away from; give up

Example Sentences:

He had chosen to adopt the boys, whose biological father had relinquished custody after failing to pay child support.

Marriage involves relinquishing some aspect of personal freedom in order to submit to the disciplined identities of husband or wife.