Cognate with Russian смага(smaga, “heat”), Serbo-Croatian смаг/smag, смагнути/smagnuti(“to pine away”). Non-Slavic cognates include German schmauchen(“to puff away”), English smoke, Armenian մուխ(mux, “smoke”). The relation to Russian смуглый(smuglyj), Sanskrit समा(samā) (and German Sommer) is unclear.