Definitionen
1.VerbTo react, using fermentation; especially to produce alcohol by aging or by allowing yeast to act on sugars; to brew.
2.VerbTo stir up, agitate, cause unrest or excitement in.
3.NounSomething, such as a yeast or barm, that causes fermentation.
4.NounA state of agitation or of turbulent change.
5.NounA gentle internal motion of the constituent parts of a fluid; fermentation.
6.NounA catalyst.