"produce (a beverage) by fermentation; prepare by mixing and boiling," Old English breowan (class II strong verb, past tense breaw, past participle browen), from Proto-Germanic *breuwan "to brew" (source also of Old Norse brugga, Old Frisian briuwa, Middle Dutch brouwen, Old High German briuwan, German brauen "to brew"), from PIE root *bhreu- "to boil, bubble, effervesce, burn." The etymological sense thus is "make (a drink) by boiling." The intransitive, figurative sense of "be in preparation" (in reference to trouble, etc.) is from c. 1300. Related: Brewed; brewing.
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."