O.E.
feter "chain or shackle for the feet," from P.Gmc.
*fetero (cf. Du.
veter, O.H.G.
fezzera, O.N.
fioturr), from PIE root
*ped- "foot" (see
foot). The generalized sense of "anything that shackles" had evolved in O.E. The verb is first recorded c.1300.