is similar to: barbarous, brutal, cruel, fell, roughshod, savage, vicious | beastly, bestial, brutal, brute, brutish | cannibalic | cold, cold-blooded, inhuman, insensate | pitiless, unkind.

see also: painful.

is an attribute of: humaneness.

is the opposite of: humane.

derivation: inhumaneness, inhumanity.