Double

Chamber's Twientieth Century Dictionary · 1908 · p. 32

dub′l, adj. twofold: twice as much: of extra weight, size, or quality: two of a sort together: in pairs: acting two parts, insincere.— adv. Doub′ly . [O. Fr. doble —L. duplus — duo , two, and plus , akin to plenus , full.]