barbarous -
(of persons or their actions) able or disposed to inflict pain or suffering; "a barbarous crime"; "brutal beatings"; "cruel tortures"; "Stalin's roughshod treatment of the kulaks"; "a savage slap"; "vicious kicks"
inhumane lacking and reflecting lack of pity or compassion; "humans are innately inhumane; this explains much of the misery and suffering in the world"; "biological weapons are considered too inhumane to be used"
