Ungrateful vs. Ingrateful — Which is Correct Spelling?

Not feeling or exhibiting gratitude, thanks, or appreciation.

Not agreeable or pleasant; repellent

Not grateful; not expressing gratitude.

A person who fails to show gratitude; an ingrate.

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

Unpleasing; unacceptable; disagreeable; as, harsh sounds are ungrateful to the ear.

Not feeling or showing gratitude;

Disagreeable;