Latin buttis "cask". Bottle is related. A storeroom of casks of wine was called a buterie, and that is where the U.K. English term buttery "food shop in a college" comes from

Cool, Bill! Yup, the French word for bottle is
bouteille: all this is now clearly related. Thanks.

And, re: aloof--I reckon aluffe meant that the ship is
standing off (from the shore), and so aloof for people means
they're stand-offish.