Antonyms of adj kindhearted

1 sense of kindhearted

Sense 1
kindhearted, kind-hearted -- (having or proceeding from an innately kind disposition; "a generous and kindhearted teacher")

INDIRECT (VIA kind) -> unkind -- (lacking kindness; "a thoughtless and unkind remark"; "the unkindest cut of all")

Similarity of adj kindhearted

1 sense of kindhearted

Sense 1
kindhearted, kind-hearted -- (having or proceeding from an innately kind disposition; "a generous and kindhearted teacher")
       => kind (vs. unkind) -- (having or showing a tender and considerate and helpful nature; used especially of persons and their behavior; "kind to sick patients"; "a kind master"; "kind words showing understanding and sympathy"; "thanked her for her kind letter")