"a brutal murder"
synonyms: savage, cruel, vicious, ferocious, brutish, barbaric, barbarous, wicked, murderous, bloodthirsty, cold-blooded, callous, heartless, ruthless, merciless, sadistic;
More Punishingly hard or uncomfortable.
direct and lacking any attempt to disguise unpleasantness.
"I will fucking end your life, right here right now." He said as he placed the pistol to my head
"Don't test me." He said as he smiled sinisterly while loading the gun.