(uncountable) The state or quality of being unkind. / (countable) An unkind act. / (countable) The collective noun for ravens

plural of unkindness

Lacking kindness, sympathy, benevolence, gratitude, or similar; cruel, harsh or unjust; ungrateful. / (obsolete) Not kind; contrary to nature or type; unnatural.

comparative form of unkind: more unkind