Open English Wordnet
Verbs
(v)waive, relinquish, forgo, forego, foreswear, dispense withdo without or cease to hold or adhere to“We are dispensing with formalities”, “relinquish the old ideas”
(v)let go of, let go, release, relinquishrelease, as from one's grip“Let go of the door handle, please!”, “relinquish your grip on the rope — you won't fall”