"liquor barrel, cask for wine or ale," late 14c., from Anglo-French but and Old French bot "barrel, wine-skin" (14c., Modern French botte), from Late Latin buttis "cask" (see bottle (n.)). Cognate with Spanish and Portuguese bota, Italian botte. Usually a cask holding 108 to 140 gallons, or roughly two hogsheads; at one time a butt was a legal measure, but it varied greatly and the subject is a complicated one (see notes in Century Dictionary).
word-forming element making nouns meaning "place for, art of, condition of, quantity of," from Middle English -erie, from Latin -arius (see -ary). Also sometimes in modern colloquial use "the collectivity of" or "an example of."