Merriam-Webster Collegiate Dictionary - denier

 I. noun  Date: 15th century one who denies ~s of the truth  II. noun  Etymology: Middle English denere, from Anglo-French dener, ~, from Latin denarius, coin worth ten asses, from denarius containing ten, from deni ten each, from decem ten — more at ten  Date: 15th century  1. a small originally silver coin formerly used in western Europe  2. a unit of fineness for yarn equal to the fineness of a yarn weighing one gram for each 9000 meters 100-~ yarn is finer than 150-~ yarn