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.”