fidare

fidare [backformed fromaffidare] , to swear, pledge faith. 1248 †fiderunt [? l. fidarunt; CalIMisc 55 p. 17: †vider[in]t] ‥ quod ‥ electi essent ‥ piscatores Ext. Guern. 27; to swere, ~are, con-, fiduciare CathA; Mon. Rit. I 54 (v. fidatio 2).