INHUMANE

inhumane

(adjective) 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”

Source: WordNet® 3.1

Etymology

Adjective

inhumane (comparative more inhumane, superlative most inhumane)

lacking pity or compassion for misery and suffering; cruel, unkind, not humane.

Antonyms

• humane

Source: Wiktionary