let go (v)
let go of (v)
release (v)
relinquish (v)

Definition: release, as from one's grip
Example: Let go of the door handle, please!. relinquish your grip on the rope--you won't fall.

dispense with (v)
forego (v)
foreswear (v)
forgo (v)
relinquish (v)
waive (v)

Definition: do without or cease to hold or adhere to
Example: We are dispensing with formalities. relinquish the old ideas.