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 of fermentation in; to set in motion; to excite internal emotion in; to heat.

Ye vigorous swains! while youth ferments your blood. --Pope.

Source: Webster's Revised Unabridged Dictionary (1913)