unleash

verb (used with object)

1. to release from or as if from a leash; set loose to pursue or run at will.
2. to abandon control of: to unleash his fury.

verb (tr)

1. to release from or as if from a leash
2. to free from restraint or control

v.1670s, from un- (2) + leash (v.). Related: Unleashed; unleashing.