Here are some synonyms for relinquish:
* Abandon
* Cease
* Forgo
* Give up
* Release
* Surrender
* Yield
Example:
* "She relinquished her claim to the throne after her father's death."
* "The doctor advised the patient to relinquish smoking for their health."
* "The company relinquished its control over the subsidiary."
Note: "Relinquish" can also be used figuratively to describe giving up a feeling or a habit.