01 a. Not grateful; not thankful for favors; making no returns, or making ill return for kindness, attention, etc.; ingrateful.
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1.
Not grateful; not thankful for favors; making no returns, or making ill return for kindness, attention, etc.; ingrateful.
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2.
Unpleasing; unacceptable; disagreeable; as, harsh sounds are ungrateful to the ear.