Unkind

Adjective

 * 1)  Having no race or kindred; childless.
 * 2) Not kind; contrary to nature, or the law of kind or kindred; unnatural.
 * 3) Wanting in kindness, sympathy, benevolence, gratitude, or the like; cruel; harsh; unjust; ungrateful.

Thesaurus
callous, cruel, disagreeable, flinty, hard, harsh, heartless, ill, inconsiderate, inflexible, inhospitable, inhuman, insensitive, mean, rigid, severe, stern, thoughtless, tough, unaffectionate, unamiable, unbending, unbenign, unbenignant, uncaring, uncharitable, unchristian, uncompassionate, uncompassioned, unconcerned, uncordial, unfeeling, ungenial, ungracious, unkindly, unloving, unsympathetic, unsympathizing, unthoughtful, unyielding

Anagrams

 * nudnik