Roots/*penkʷepenkʷe“five, the number five”Widely acceptednumberfive, fifthRoot for the number five, yielding Latin quinque, English five, Greek pente.Related Rootsdel-“to count, recount, tell”dwo-“two, a pair”déḱm̥“ten, a decade”h₁newn̥“nine, the number nine”h₃eḱtō“eight, the number eight”sem-“one, together”sem-₂“one, same, together”septm̥“seven, the number seven”