From The Collaborative International Dictionary of English v.0.48 [gcide]: Ferment \Fer*ment"\, v. t. [imp. & p. p. Fermented; p. pr. & vb. n. Fermenting.] [L. fermentare, fermentatum: cf. F. fermenter. See Ferment, n.] To cause ferment or fermentation in; to set in motion; to excite internal emotion in; to heat. [1913 Webster] Ye vigorous swains! while youth ferments your blood. --Pope. [1913 Webster]