That (or rather *snoigwh-o-s, from the root *sneigwh-) is the reconstructed Proto-Indo-European word for snow, large quantities of which have been falling in NYC and will supposedly continue doing so until there are 12 to 16 inches on the ground; we went into Manhattan to enjoy it to the full in Central Park, checked out the snowball fight (not very impressive in extent, but full of enthusiasm), and watched a bunch of happy dogs. Winter is definitely here.
Lest you think the PIE form was simply a cheap excuse to tell you about my day, here are some other descendents of the PIE root (cf. Pokorny’s entry and the The Pali Text Society’s Pali-English dictionary):
Vedic snihyate, Av. snazaiti it snows = Lat. ninguit, Gr. neiphei; OIr. snigid it rains; Lat. nix snow = Gr. nipha = Goth. snaiws, OHG. sneo = Eng. snow; OIr. snige rain = W. nyf; Lith. snie~gas = Latv. sniegs = OPr. snaygis ‘snow,’ Lith. snie~ga it’s snowing (inf. snigti); OCS snyegu, Russ. sneg ‘snow’