a.
1.
Uncivilized, rough, coarse, rude, untutored, ignorant, unlettered, uncultivated, untamed, savage, barbarian, barbaric.
2.
Cruel, inhuman, brutal, brutish, unfeeling, ferocious, ruthless, fell, truculent, fierce, bloody, savage.
3.
Uncouth ( as a word or an expression ), harsh, rugged, vulgar, contrary to good usage, full of impurities, full of infelicities.