Where does “fumulus” come from?

fumulus (English) comes from English fume, from Middle English fume, from Old French fum, from Latin fūmus, from Proto-Italic fūmos, from Proto-Indo-European dʰuh₂mós, from Proto-Indo-European dʰewh₂- — smoke; mist, haze.

fumulus (English): A very thin cloud resembling a veil, especially...

Definitions

  1. A very thin cloud resembling a veil, especially...

Ancestry of “fumulus”, step by step

fumulus traces back through two separate lines of ancestry.

via English fume

StepLanguageWordMeaning
1EnglishfumeA gas or vapour/vapor that is strong-smelling or...
2Middle EnglishfumeVisible gaseous emanations; fumes or smoke; Any...
3Old Frenchfumsmoke
4Latinfūmussmoke, steam, fume
5Proto-Italicfūmossmoke
6Proto-Indo-Europeandʰuh₂móssmoke
7Proto-Indo-Europeandʰewh₂-smoke; mist, haze

via English cumulus

StepLanguageWordMeaning
1EnglishcumulusA large white puffy cloud that develops through...
2Latincumulusheap, pile; surplus; summit
3Proto-Indo-Europeanku-m-olo
4Proto-Indo-Europeanḱewh₁-to swell; to be strong
Every word from Proto-Indo-European dʰewh₂-