硝烟

硝烟	xiāo yān	smoke (from guns)
硝	xiāo	saltpeter / to tan (leather)
烟	yān	cigarette or pipe tobacco / CL:根 / smoke / mist / vapour / CL:缕 / tobacco plant / (of the eyes) to be irritated by smoke
烟	yān	tobacco (variant of 烟)