Having no race or kindred; childless.

Not kind; contrary to nature, or the law of kind or kindred; unnatural.

Wanting in kindness, sympathy, benevolence, gratitude, or the like; cruel; harsh; unjust; ungrateful.

lacking kindness; "a thoughtless and unkind remark"; "the unkindest cut of all"

lacking or showing kindness or compassion or mercy

used of circumstances (especially weather) that cause suffering; "brutal weather"; "northern winters can be cruel"; "a cruel world"; "a harsh climate"; "a rigorous climate"; "unkind winters"