Ferment

1. To be agitated or excited by violent emotions.
2. To cause ferment of fermentation in; to set in motion; to excite internal emotion in; to heat.
3. Intestine motion; heat; tumult; agitation.
4. That which causes fermentation, as yeast, barm, or fermenting beer.
5. A gentle internal motion of the constituent parts of a fluid; fermentation.
6. To undergo fermentation; to be in motion, or to be excited into sensible internal motion, as the constituent oarticles of an animal or vegetable fluid; to work; to effervesce.