(Greek: vapor, steam; air, gas; respiration)

(Greek: argus, neutral, inactive, idle, inert; gas)

(Greek: chloros, grass-green; a reference to the color of the gas which tends to be greenish-yellow; gas)

(Modern Latin: chemical element; from Latin, fluere, to flow; gas)

(Modern Latin: chemical element; from Greek, helios, the sun, first observed in the sun’s atmosphere; gas)

(Greek: hydor, "water", plus gen, "born", "forming"; gas)

(Greek: kryptos, "hidden"; gas)

(Greek: neo, "new" or the "new one"; gas)

(Latin: "forming niter", or “niter producer”; because niter, a mineral properly called potassium nitrate, and contains nitrogen, a compound of nitrogen; gas)

(Greek: oxys, "sharp", plus gen, "forming"; from the incorrect belief that oxygen forms acids; gas)

(Modern Latin: from Greek, xenon, "stranger"; gas)

(Greek: sparse, thin, rare; slack, loose; by extension, "gas, vapor")