出典:Wiktionary
From Middle English lith, lyth, from 古期英語 liþ (“limb, member, joint, tip of finger, point”), from Proto-Germanic *liþuz (“limb”), of unknown origin. Cognate with Scots lith (“part of the body, joint”), West Frisian lid (“part of the body, member”), Dutch lid (“limb, member, section”), Middle High German lit (“limb, member”), Swedish led (“joint, link, channel”), Icelandic liður (“item”), Dutch lid (“part of the body; member”) and gelid (“joint, rank, file”), German Glied (“limb, member, link”).
lith (複数形 liths)
From Middle English lith, lyth (“owndom”), from Old Norse lýðr (“people, lede”), from Proto-Germanic *liudiz (“men, people”), from Proto-Indo-European *h₁lewdʰ- (“man, people”). Cognate with Dutch lieden and lui, German Leute (“people”), 古期英語 lēode (“people”). More at lede.
From *Middle English lith, from Old Norse hlið (“a gap, gate, space”), from Proto-Germanic *hlidą (“door, lid, eyelid”), from Proto-Indo-European *ḱel- (“to conceal, hide”). Cognate with dialectal Norwegian lid, led (“an opening in a fence”), Scots lith (“a gap in a fence, gate opening”), 古期英語 hlid (“lid, covering, door, gate, opening”). More at lid.
By shortening.
From the Ancient Greek λῐ́θος (líthos, “stone”).