köken: Inherited from Old Spanish sufre, from Latin sulfur, sulphur, sulphure, possibly from Proto-Indo-European *swelplos, from the root *swel- (“to burn, smoulder”). Compare modern French soufre. The initial a- could have appeared due to a misinterpretation of the expression piedra sufre (literally “sulfur stone”).
aile: azufrar, azufrera, azufrero, dióxido de azufre
köken: Borrowed from Persian گوگرد (gugerd, “sulfur”). Cognate with Tatar күкерт (kükert), Kyrgyz күкүрт (kükürt), Kazakh күкірт (kükırt), Uzbek oltingugurt, Turkmen kükürt, Turkish kükürt, Azerbaijani kükürd (“sulfur”), etc.
köken: From Old Galician-Portuguese suffre (with the prefix en-), from Latin sulfur, sulphur, suphure, from Proto-Indo-European *swelplos, from the root *swel- (“to burn, smoulder”). Compare Galician xofre and Spanish azufre. Doublet of súlfur.
köken: From Proto-Finnic *rikki, of unknown further origin. Cognates include Ingrian rikki, Karelian rikki, Ludian rik (“sulfur, earwax”), Veps rik (“sulfur, rheum”) and Votic ričči. Germanic loan origin has been suggested (compare German Dreck), as well as indigenous derivation as rikka + -i.
köken: From gyú (“shortened from gyújt (“to light, to spark”), used as an adjective”) + fa (“wood”). Created during the Hungarian language reform, which took place in the 18th–19th centuries, as a calque of Austrian German Zündholz. First attested in 1840.