n a process in which an agent causes an organic substance to break down into simpler substances; especially, the anaerobic breakdown of sugar into alcohol
v be in an agitated or excited state
v work up into agitation or excitement
v cause to undergo fermentation
v go sour or spoil
v. （使）发酵( ferment的现在分词 ); （使）激动; 骚动; 骚扰