The Proto-Indo-European word *ĝheim-
Word *ĝheim-
Meaning snow, winter
See also Hittite: gi-im- ‘winter’
Synonyms *sneigʷh-

Comments
Skr. hemanta, Lat. hiems, Gk. kheima, Gaul. Giamillus, OCS zima, Russ. zima, Polish zima, Lith. žiema, Ltv. ziema, Old Prussian semo, Av. zimo, Arm. dzmeṙ /cmeṙ , Alb. dimër/dimën, Kamviri zẽ , Pers. /zemestān, Toch. śärme/śimpriye, Welsh gaeaf, Ir. gaimred/geimhreadh, Hitt. gima, ON gói, Pers. /dai

Other words that might be of interest
*h₂stḗr ‘star’, *méh₁-nōt ‘moon, month’, *nebʰ-o-, nebʰ-i- ‘cloud’, *sneudh- ‘cloud, mist’, *séhₐul ‘sun’, *h₃meigh- ‘drizzle, mist’, *nébʰes- ‘mist, cloud, sky’, *(s)kand- ‘shine, glitter, moon’, *louksnehₐ- ‘moon’