1. Not kind; contrary to nature, or the law of kind or kindred; unnatural. [Obs.] “Such unkind abominations.”
2. Wanting in kindness, sympathy, benevolence, gratitude, or the like; cruel; harsh; unjust; ungrateful.
He is unkind that recompenseth not; but he is most unkind that forgetteth. --Sir T. Elyot.
-- Un*kind*ly, adv. -- Un*kind*ness, n.
n : lack of sympathy [ant: kindness]