Where does “θūmos” come from?

θūmos (Proto-Italic) comes from Proto-Indo-European dʰuh₂mós, from Proto-Indo-European dʰewh₂- — smoke; mist, haze.

Ancestry of “θūmos”, step by step

StepLanguageWordMeaning
1Proto-Indo-Europeandʰuh₂móssmoke
2Proto-Indo-Europeandʰewh₂-smoke; mist, haze
Every word from Proto-Indo-European dʰewh₂-Every word from Proto-Indo-European dʰuh₂mós