Un*grate"ful (?), 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.
© Webster 1913.