Roots/*dwóh₁dwóh₁“two, a pair”Widely acceptednumberstwoPIE word for two. Gives Latin duo, English "two", "twin", Greek dúo, Sanskrit dvā́.Related Rootsdwi-tó-“second, in two”déḱm̥t“ten, a decade”h₁óynos“one, single, alone”kʷetwóres“four, the number four”oḱtṓw“eight, the number eight”pr̥h₃wós“first, foremost”swéḱs“six, the number six”tréyes“three, the number three”