Driest

adjective

1. Free from or lacking moisture.

   "This towel's dry. Could you wet it and cover the chicken so it doesn't go dry as it cooks?"

2. Unable to produce a liquid, as water, oil, or (farming) milk.

   "This well is as dry as that cow."

3. Built without or lacking mortar.
4. Anhydrous: free from or lacking water in any state, regardless of the presence of other liquids.

   "Dry alcohol is 200 proof."

5. Athirst, eager.