confarreation (n.)

"patrician form of marriage in ancient Rome," c. 1600, from Latin confarreationem (nominative confarreatio), noun of action from past-participle stem of confarreare "to unite in marriage by the Ceremony of the Cake," from assimilated form of com "with, together" (see con-) + far, farris "spelt, grain, meal," which is probably from PIE root *bhars- "bristle, point, projection" (see bristle (n.)).

In ancient Rome, the most solemn form of marriage, in which an offering of salted bread (pannis farreus) was made in the presence of the Pontifex Maximus and 10 witnesses. It fell into general disuse early in the Empire.