truculent [ˈtrʌkyələnt] a.
1.) Characterized by or exhibiting ferocity or cruelty; fierce, cruel, savage, barbarous.
2.) Of speech or writing: Violent; rude; scathing; savage; harsh.
3.) transf. Of a disease: Destructive; deadly. Obs. rare.
4.) (In catachrestic use, associated with truck, truckle) Mean, base, mercenary (O.E.D. 2nd Ed.).
Etymology: Latin truculentus, from trux, truc-, fierce.
"But Zeus who masses cloud
regarded him with frowning brows and said:
'Do not come whining here, you two-faced brute,
most hateful to me of all the Olympians.
Combat and brawling are your element.
This beastly, incorrigible truculence
comes from your mother, Hera, whom I keep
but barely in my power, say what I will'".
(The Iliad by Homer, Robert Fitzgerald (trans.), 1974)