To hurt or sting.
After being hit with a pitch, the batter exclaimed "Ouch, my arm smarts!"
To cause a smart or sting in.
To feel a pungent pain of mind; to feel sharp pain or grief; be punished severely; to feel the sting of evil.
A sensation that smarts or stings.
Painful, sore.
My arm is still smarting from where the ball hit it.
Experiencing emotional pain or embarrassment.