llei — de Vaan
llei 'less', Skt. raghu- 'fleet, fast', YAv. rmaa- [adj.f] 'agile, fast, quick', sup. rBrtjisto-^ Gr. έλαχύς 'small, little', Alb. lehte, Lith. lengvas 'light', OCS Ibgbkb, Ru, legkij, Go. leihts, OHG Kht, OIc. lettr, ToB lankjse 'light5 < PIE *hilengwh-to-; Gr. ελαφρός 'light, dexterous, fast, little', OHG lungar 'fast, cheerful' < *h1lngwh-ro-. There appear to be two PIE forms of the root, *h1l(e)ngwh- and … — [de Vaan, s.v. llei, p. 350]