From Proto-Germanic *liþugaz, equivalent to liþ +‎ -iġ. Cognate with Dutch leeg (“empty, hollow”), German ledig (“unmarried”) and Icelandic liðugur (“flexible, supple”).

liþiġ

1. pliant, supple, flexible, soft, yielding

• Middle English: lethi
  • English: lithy

• Joseph Bosworth; T. Northcote Toller (1898), “līþiġ”, in An Anglo-Saxon Dictionary, second edition, Oxford: Oxford University Press.