Use the noun acridness to talk about the sharp or bitter taste of something. You might, for example, worry about the acridness of your homemade apple cider.
When something is acrid, it's bitter or sour, and the word acridness describes that quality, especially of a food, drink, or something you accidentally taste. When you describe something's acridness, you probably don't like its flavor. When you bite your nails after applying mosquito repellant, you'll be surprised by the acridness on your fingertips! The Latin word acer is at the root of acridness, and it means "sharp, pungent, bitter, or fierce."