dryest

free from liquid or moisture; lacking natural or normal moisture or depleted of water; or no longer wet;
humorously sarcastic or mocking;
lacking moisture or volatile components;
opposed to or prohibiting the production and sale of alcoholic beverages;
not producing milk;
(of liquor) having a low residual sugar content because of decomposition of sugar during fermentation;
without a mucous or watery discharge;
not shedding tears;
lacking interest or stimulation; dull and lifeless; - John Mason Brown
used of solid substances in contrast with liquid ones;
unproductive especially of the expected results;
having no adornment or coloration;
(of food) eaten without a spread or sauce or other garnish;
having a large proportion of strong liquor;
lacking warmth or emotional involvement;
practicing complete abstinence from alcoholic beverages;

dryest is a valid Scrabble (US) TWL word

dryest is a valid Scrabble Word in Merriam-Webster MW Dictionary

dryest is a valid Scrabble Word in International Collins CSW Dictionary

dryest is a valid Words With Friends word