[adj] (of circumstances; especially weather) causing suffering; "brutal weather"; "northern winters can be cruel"; "a cruel world"; "a harsh climate"; "a rigorous climate"; "unkind winters"
[adj] lacking or showing kindness or compassion or mercy
[adj] deficient in humane and kindly feelings
[adj] lacking kindness; "a thoughtless and unkind remark"; "the unkindest cut of all"
brutal, cruel, cutting, edged, hard, harsh, heartless, hurtful, inhumane, pitiless, rigorous, stinging, unkindly, unsympathetic