Snowy

wiktionary

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From Middle English snowy, snawy, from Old English snāwiġ, equivalent to snow +‎ -y.

etymonline

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snowy (adj.)

Old English snawig; see snow (n.) + -y (2). Related: Snowiness. Similar formation in Middle Low German sneig, Old High German snewac, German schneeig, Old Norse snæugr, Swedish snögig, Danish sneig.