lith (n.) Look up lith at Dictionary.com
"joint, limb of the body" (now obsolete or provincial), Old English liþ "limb, member, joint," cognate with Old Frisian lith, Dutch lid, Old High German lid, Old Norse liðr, Gothic liþus, and, compounded with ga-, German glied "limb, member." Lith and limb was a Middle English alliterative pairing.