(a) Odious, detestable. (b) Full of hatred; malevolent, malicious; hostile. (c) Cruel; fierce; deadly.

Wrathful.

Of things, actions, language, etc.: Cruel, painful, bitter, severe, terrible, dreadful.

Intensely painful or destructive; keen, piercing; deadly. Of a thing, esp. a natural agent, weapon, disease, suffering, poison, etc.