·adj Unpleasing; unacceptable; disagreeable; as, harsh sounds are ungrateful to the ear.
II. Ungrateful ·adj Not grateful; not thankful for favors; making no returns, or making ill return for kindness, attention, ·etc.; ingrateful.
A parson, who at least once a week abuses his best benefactor, i.e. the devil. ...
Dictionary of The Vulgar Tongue by Francis Grose