Stinging; acerbic.
Having a sharp and stiff point.
Having a strong odor that stings the nose, said especially of acidic or spicy substances.
Having a strong taste that stings the tongue, said especially of hot (spicy) food, which has a strong and sharp or bitter taste.
Tending to snap or bite
Irritable.
Chilly, brisk, sharp.
Tidy; well-dressed; sharp.
Clever, catchy.
Rapid and without delay.