Verb
set loose (third-person singular simple present sets loose, present participle setting loose, simple past and past participle set loose)
(transitive) To set free, let go, release, liberate, unleash.
One scarcely knows if he would be of more use to us as a hostage, or set loose to be a very bad enemy leader. Lois McMaster Bujold
Above all, I would not expect a wise race, at great expense, to set loose an army of self-replicating robots. Bernard M. Oliver