köken: Inherited from Proto-Turkic *ōtïn (“firewood”), from *ōt (“fire”); cognate with Azerbaijani odun, Bashkir утын (utın), Kyrgyz отун (otun), Tatar утын (utın), Turkmen odun, Uyghur ئوتۇن (otun) and Uzbek o'tin.
köken: From *ōtuñ (“firewood”), from Proto-Turkic *ōt (“fire”). Cognate with Old Uyghur [script needed] (otuŋ, “firewood”), Karakhanid [script needed] (otuŋ, “firewood”); Kazakh отын (otyn), Kyrgyz отун (otun), Southern Altai одын (odïn), Uzbek o'tin, Turkmen odun, Turkish odun, etc.
köken: Inherited from Old Galician-Portuguese lenha (“firewood”), from Latin ligna, plural of lignum (“firewood”). Cognate with Galician leña, Spanish leña, Catalan llenya, Occitan lenha, Romanian lemn and Italian legna.
From Proto-Vietic *guːs ~ *kuːs (“fire; firewood”), from Proto-Austroasiatic *ʔuːɕ (“firewood”). Cognate with Muong cúi (“fire, firewood”), Pacoh uih, Khmer អុស (ʼoh). This is one of three known cases of velar initial in Vietnamese corresponding to zero-initial in other Austroasiatic branches. The other two cases are cứt (“shit”) and the dialectal cảy (“swollen”).