Etymology

From Sanskrit धूम ‎(dhūmá, “smoke, vapor, mist”) +‎ -ము ‎(-mu); from Proto-Indo-European *dʰuh₂mós ‎(“smoke”). Cognates include Ancient Greek θυμός ‎(thumós), Latin fūmus and Old Church Slavonic дꙑмъ ‎(dymŭ).