unkind

adjective3

1. •
   Lacking kindness, sympathy, benevolence, gratitude, or similar; cruel, harsh or unjust; ungrateful.

   • Yet was it ne’er my Fate, from thee to find A Deed ungentle, or a Word unkind: When others curst the Auth’ress of their Woe, Thy Pity check’d my Sorrows in their Flow: — 1720
2. •
   (no longer used) Not kind; contrary to nature or type; unnatural.

   • […] A Feauer is an vnkinde heate, that commeth out of the heart, and passeth into all the members of the bodye, and grieueth the working of the bodye. — 1582
3. •
   (no longer used) Having no race or kindred; childless.

   • O, had thy mother borne so hard a mind, She had not brought forth thee, but died unkind. — 1593