unrestrained

immoderate; not restrained or held in check; inordinate (literary).

The party was a scene of unrestrained debauchery.

spontaneous, natural and informal; unconstrained

Their meeting was one of unrestrained joy.

Not subject to physical restraint.

Managing unrestrained prisoners alone in any environment is inherently dangerous and should not be tolerated.

In an accident there will often be injuries, as people are unrestrained. But in the case of Sandilands, I don't think anyone would have foreseen the seven deaths and 62 injuries that occurred when the tram overturned [...].