Recklessly violent, furious, ruthless, cruel.

Of a person, his or her actions, etc.: violent, extravagant, unrestrained; romping.

= turbulent, adj., troublous, adj. 2.

That flings. Of the Fiend: Raging, rampant, turbulent (cf. quot. 1500 at fling, v. 1a).

Of persons, their attributes and actions: Causing disturbance or commotion; disposed or inclined to disorder; tumultuous; unruly; violent.

Of a person: violent or unrestrained in action, performance, opinion, etc.; unchecked, holding sway.

Violently or boisterously uncontrollable; unruly, running wild; given to or characterized by rampaging.

= rampageous, adj.