Where does “whirlwindy” come from?

whirlwindy (English) comes from English whirlwind, from English wind, from English farm, from Middle English ferme, from Old French ferme, from Medieval Latin ferma, from Latin Firma, from Latin Firmus — to support; to hold.

Ancestry of “whirlwindy”, step by step

whirlwindy traces back through two separate lines of ancestry.

via English whirlwind

StepLanguageWordMeaning
1EnglishwhirlwindA violent windstorm of limited extent, as the...
2EnglishwindReal or perceived movement of atmospheric air...
3EnglishfarmA place where agricultural and similar activities...
4Middle EnglishfermeA lease; the renting of land
5Old Frenchfermelease; the land leased; farm
6Medieval LatinfermaAlternative form of firma
7LatinFirmatax, tribute
8LatinFirmusstrong, powerful
9Proto-Italicfermos
10Proto-Indo-Europeandʰer-mo-sholding
11Proto-Indo-Europeandʰer-to support; to hold

via English Y

StepLanguageWordMeaning
1EnglishYA figure or mark in the shape of the letter Y; A...
2EnglishyuriA narrative or visual work featuring a romance or...
3Japanese百合lily
4Japanese連用形an inflectional category: the continuative or...
5Japanese見るto see, to watch, to observe, to look at...
6Japanesea dream; a vision; leaving reality to the state...
7Old Japanesea dream
8Japanesean order in biology: smaller than a class, bigger...
9Middle Chinese
Every word from Proto-Indo-European dʰer-