bar·ba·rous 
(bärbər-əs)
(bärbər-əs)adj.
1. Primitive or undeveloped in culture and customs; uncivilized.
2. Lacking refinement or culture; coarse: inappropriate, barbarous behavior.
3. Characterized by savagery; very cruel: a barbarous punishment; a barbarous tyrant.
4. Marked by the use or occurrence of barbarisms in spoken or written language.
[From Latin barbarus, from Greek barbaros, non-Greek, foreign; see BARBARISM.]
barba·rous·ly adv.
barba·rous·ness n.