Is it ensure, insure, or assure?
a small handbag shaped like a long narrow bread loaf
1727, a type of architectural ornament, from French baguette (16c.), from Italian bacchetta, literally "a small rod," diminutive of bacchio "rod," from Latin baculum "a stick" (see bacillus). Meaning "a diamond cut long" is from 1926; that of "a long, thin loaf of French bread" is from 1958.