The common Greek word for smoke — the dark, billowing vapor produced by combustion. While the term is straightforward in its literal sense, the NT deploys it almost exclusively in charged theological and apocalyptic contexts. At Pentecost, Peter quotes Joel's prophecy of 'blood and fire and vapor of smoke' (Acts 2:19). In Revelation, smoke rises from the golden altar's incense before God (Rev 8:4), pours from the abyss like smoke from a great furnace (Rev 9:2), and ascends from the torment of Babylon forever (Rev 14:11; 18:9, 18; 19:3). Every target language uses a single, consistent term (Spanish humo, French fumée, German Rauch), reflecting the word's semantic simplicity even within its dramatic apocalyptic settings.