When you buy a bottle of wine or a carton of milk, the ullage is the space near the top of the vessel containing no liquid. The term ultimately derives from the Latin oculus, meaning eye: thanks to the Gallic contempt for consonants, the Latin oculus evolved into oeil, an unpronounceable French word meaning eye; oeil then gave rise to the verb ouiller, meaning to fill a wine-cask up to its eye, the eye being the bung-hole into which new wine is poured. Ouiller in turn gave rise to the noun ouillage, signifying the space above the eye of the cask, which English adopted in the early fourteenth century as ullage. A word closely related to ullage is inveigle, meaning to deceive, which derives via French from the Latin ab oculo, meaning away from the eye.