mur·der·ous 
(mûrdər-əs)
(mûrdər-əs)adj.
1. Capable of, guilty of, or intending murder: a group of murderous thugs.
2. Characteristic of or giving rise to murder or bloodshed: murderous mistrust.
3. Informal Capable of devastating or overwhelming: a murderous exam.
murder·ous·ly adv.
murder·ous·ness n.