a substance capable of bringing about fermentation
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"
work up into agitation or excitement; "Islam is fermenting Africa"
be in an agitated or excited state; "The Middle East is fermenting"; "Her mind ferments"
excite to an abnormal condition, of chafe or inflame; "Aspirin irritates my stomach"
excite to some characteristic action or condition, such as motion, contraction, or nervous impulse, by the application of a stimulus; "irritate the glands of a leaf"