ferment
n.n. a process where microorganisms like yeast or bacteria change a substance, often to make it alcoholic or sour. It can also describe a period of great activity or excitement in a society.
n. a chemical process involving the action of microorganisms, typically resulting in the production of alcohol or acid. In a figurative sense, it refers to a state of intense activity, agitation, or rapid development.
The fermentation of the grapes takes several weeks.
The local economy is currently in a state of ferment as new tech companies move into the area.
The rapid fermentation of the sugar solution produced a significant amount of carbon dioxide, which the scientists monitored closely to ensure the reaction remained controlled.
From Middle English ferment, from Middle French ferment, from Latin fermentāre (“to leaven, ferment”), from fermentum (“substance causing fermentation”), from fervēre (“to boil, seethe”). See also fervent.