Merriam-Webster Collegiate Dictionary - sextuple

 I. adjective  Etymology: probably from Medieval Latin sextuplus, from Latin sextus sixth + -plus multiplied by; akin to Latin -plex -plex — more at -fold  Date: 1626  1. having six units or members  2. being six times as great or as many  3. marked by six beats per measure of music ~ time  • ~ noun  II. verb  (~d; sextupling)  Date: 1632  transitive verb to make six times as much or as many  intransitive verb to become six times as much or as numerous