Answer: acerbity

AnswerCrossword Clue
ACERBITYSourness
ACERBITYSharpness.
ACERBITYHarshness of temper.
ACERBITYTartness
acerbitysourness, with roughness or astringency of taste
acerbitysourness (the state of being sour (sharp or biting to the taste))
acerbityharshness or severity, as of temper or expression