Proto-IE: *neik-
Meaning: to winnow
Old Greek: neîklo-n, níklo-n = tò líknon Hsch., neikētḗr = likmētḗr Hsch.; eu<ní>kmēto<n> = eulí<k>mēton Hsch., aniklṓmenon = anakathairṓmenon Hsch., nikā̂i = likmā̂i Hsch., níkein = likmā̂n Hsch., neíkesen = ékrinen Hsch., eunikés = eukrinés Hsch., neikētḗr = likmētḗr. Megarêis. Hsch.
Celtic: *nit- > Cymr nithio `worfeln', Bret niza `worfeln'
Russ. meaning: веять (зерно)
References: WP II 321 f