Ungrateful

Part of speech: adjective (a.)

1. Not grateful; not thankful for favors; making no returns, or making ill return for kindness, attention, etc.; ingrateful. South.

2. Unpleasing; unacceptable; disagreeable; as, harsh sounds are ungrateful to the ear. -- Un*grate"ful*ly, adv. -- Un*grate"ful*ness, n.