Not mild or gentle; harsh, rough, bitter; unkind, cruel; contrary, rebellious.

Not meek; not humble or submissive; †unkind, harsh, cruel (obsolete).

Lacking in kindness; having or showing a mean-spirited, malicious, or unfriendly nature or disposition; lacking in consideration for others…

Not gentle in action; rough, harsh, unkind, violent. Of persons or disposition.

Not tender in dealing with others; ungentle, unkind. Also const. of.

Devoid of kindness or compassion; heartless.

Having an unkind nature; cold-hearted, unsympathetic. Often in negative constructions.

Lacking in kindness; having, showing, or arising from an unsympathetic, unfriendly, or hostile character or disposition; unkind.

(un-, prefix1 affix 1.)

‘Wanting in true affection, illiberal, ungenerous, unkind.’ Obs.