Unhuman vs. Inhumane: What's the Difference?

Not resembling or having the qualities of a human being.

Lacking pity or compassion.

Not human; inhuman.

Alternative form of inhuman: lacking pity or compassion for misery and suffering; cruel, unkind.

Divested of human qualities or attributes

Not humane; lacking and reflecting lack of pity, kindness, or compassion; as, humans are innately inhumane; this explains much of the misery and suffering in the world; biological weapons are considered too inhumane to be used.

Lacking and reflecting lack of pity or compassion;