Is it ensure, insure, or assure?
bright star in the left shoulder of Orion, from Latin bellatrix "a female warrior," frequently used as an adjective, "warlike, skilled in war," fem. of bellator "to wage war," from bellum "war" (see bellicose). The Latin name, from the Alfonsine Tables (mid-13c.), very loosely translates the Arabic name for the star, Al Najid "the conqueror."
In astrology it was the natal star of all destined to great civil or military honors, and rendered women born under its influence lucky and loquacious; or as old Thomas Hood said, "Women born under this constellation shall have mighty tongues." [Allen]