"fermented" in the verb sense
be in an agitated or excited state
"The Middle East is fermenting"
"Her mind ferments"
work up into agitation or excitement
"This religion is fermenting Africa"
3. ferment, work
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"
4. sour, turn, ferment, work
go sour or spoil
"The milk has soured"
"The wine worked"
"The cream has turned
Source: WordNet® (An amazing lexical database of English)
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