Stormy

wiktionary

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From Middle English stormy, stormi, from Old English stormiġ(“stormy”), equivalent to storm +‎ -y. Cognate with Dutch stormig(“stormy”), German stürmig(“stormy”), Swedish stormig(“stormy”).

etymonline

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stormy (adj.)

early 14c., from late Old English storemig (12c.), from storm (n.) + -y (2). Figurative use by mid-14c. Related: Storminess.