Noun
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a process in which an agent causes an organic substance to break down into simpler substances
especially, the anaerobic breakdown of sugar into alcohol
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a substance capable of bringing about fermentation
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a state of agitation or turbulent change or development
"the political ferment produced new leadership"
"social unrest"
Verb
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go sour or spoil
"The milk has soured"
"The wine worked"
"The cream has turned--we have to throw it out"
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cause to undergo fermentation
"We ferment the grapes for a very long time to achieve high alcohol content"
"The vintner worked the wine in big oak vats"
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work up into agitation or excitement
"Islam is fermenting Africa"
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be in an agitated or excited state
"The Middle East is fermenting"
"Her mind ferments"