O.E. fretan "eat, devour" (in O.E., used of monsters and Vikings; in M.E., used of animals' eating), from P.Gmc. compound *fra- "for-" + *etan "to eat" (cf. Du. vreton, O.H.G. freggan, Ger. fressen, Goth. fraitan). Figurative sense of "irritate, worry, eat one's heart out" is c.1200. Modern German still distinguishes essen for humans and fressen for animals. Related: Fretted; fretting.
"ornamental interlaced pattern," late 14c., from O.Fr. frete "interlaced work, trellis work," probably from Frank. *fetur (cf. O.E. fetor, O.H.G. feggara "fetter") perhaps from notion of "decorative anklet," or of materials "bound" together. The other noun, "ridge on the fingerboard of a guitar," is c.1500 of unknown origin but possibly another sense of O.Fr. frete.