The antonyms for the word "dost kindness" would be cruelty, malice, unkindness, harshness, meanness, brutality, hatred, hostility, malevolence, and wickedness. These antonyms describe actions or behaviors that are diametrically opposite to kindness. Acts of cruelty, malice, and brutality demonstrate a lack of empathy and compassion. Hostility and hatred demonstrate an unwillingness to treat others with respect and dignity. Meanness and wickedness demonstrate a disregard for the well-being of others. It is important to be aware of these antonyms to "dost kindness" and strive to avoid them in our daily interactions with others.