adjective, un·kind·er, un·kind·est.
- lacking in kindness or mercy; severe.
- lacking kindness; unsympathetic or cruel
- archaic, or dialect
- (of weather) unpleasant
- (of soil) hard to cultivate
adj.early 13c. (implied in unkindly), “strange, foreign, unnatural,” from un- (1) “not” + kind (adj.). Meaning “lacking in kindness” is recorded from mid-14c. Related: Unkindly; unkindness.