Sixth

Coming after the fifth in order; number six in a series. It can also mean one part of something that has been divided into six equal parts.

“Sixth” comes from Old English “sixta,” built from “six” plus a suffix that marks order. Both “six” and “sixth” ultimately go back to an ancient Indo‑European root for the number six. English kept a tricky consonant cluster that makes the word hard to pronounce.