usage: be in an agitated or excited state; "The Middle East is fermenting"; "Her mind ferments"
2. ferment, inflame, stir up, wake, ignite, heat, fire up
usage: work up into agitation or excitement; "Islam is fermenting Africa"
3. ferment, work, convert
usage: 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, change state, turn
usage: go sour or spoil; "The milk has soured"; "The wine worked"; "The cream has turned--we have to throw it out"