Gyve, pl. gyves
"FETTERS AND HANDCUFFS, instruments for securing the feet and hands of prisoners
under arrest, or as a means of punishment. The old names were manacles, shackbolts or
shackles, gyves and swivels. "

Now I've got to go look up "swivels". I'm in a swivet to know its definition, at least the part
that has anything to do with "fetters and manacles".