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"