bend, Irish, Middle Irish
lúbaim, Early Irish
lúpaim (
ro-lúpstair, they bent, L.Leinster):
lúbbô, root
leub,
lub; English
loop, Middle English
loupe, noose;
$$G lugízw See
lag.
Skeat regards the English as borrowed from the Celtic.
Hence lùib, a fold, creek, angle.