Is it ensure, insure, or assure?
hair grown on the upper lip by men. The wearing of mustaches, like beards, has been since antiquity a reflection of such factors as climate (local or temporal), custom, religious belief, and personal taste. It was usual in the past to make no distinction between a mustache and other facial hair such as a beard or whiskers, as these were usually worn together. As early as 2650 BC, however, Egyptian artifacts show a pencil-line mustache with no beard