Roots/*h₃eḱtōh₃eḱtō“eight, the number eight”Widely acceptednumbereight, eighthRoot for the number eight, yielding Latin octo, English eight, Greek okto.Related Rootsdel-“to count, recount, tell”dwo-“two, a pair”déḱm̥“ten, a decade”h₁newn̥“nine, the number nine”penkʷe“five, the number five”sem-“one, together”sem-₂“one, same, together”septm̥“seven, the number seven”