geal

I

a leech, Early Irish gel, Welsh gel, Cornish ghel, Breton gelaonen; Greek $$Gbdélla, $$Gblétues, leeches (Hes.); Sanskrit jalûka, blood-leech; Indo-European root gel, devour, Latin gula, throat, English gullet, etc.

II

white, Irish geal, Early Irish gel: *gelo-, Indo-European root $$ghel, clear, shine, glow; Lithuanian geltas, pale-yellow; English gleam, glow; Greek $$Ghlíw, be warm, $$Ghális, unmixed wine; etc. Stokes connects it with Lithuanian z$$?ila-s, grey; the usual derivation joins it with Latin helvus, light bay, English yellow, Lit z$$?élti, grow green, Church Slavonic zelenu$$u, green. Hence gealach, the moon, so Irish; gealan, a linnet.