smoulder, fume, oxidize
燻 centers on slow, smoky burning without open flame: smoldering, fuming, or the chemical process of oxidation that produces smoke and heat.
燻 combines fire 火 with 熏, which itself depicts smoke rising from a fire and contributes both sound and the idea of smoking or smoldering.
Fire 火 on the left and 熏 (smoke rising) on the right: picture a pile of leaves smoldering, sending up thick fumes without bursting into flame.
For クン, imagine a smoldering log giving off a deep, resonant 'coon' sound as it smokes: coon -> クン, and the smoke curls upward.
smoked food; smoking (fish, meat, etc.)
to smoke; to smoulder; to smolder; to sputter
to smoke (something); to fumigate
fumigation; smoking (out)
cold smoking
hot smoking
smoking (of meat); fumigation; oxidation (of metal)
to smoke; to fumigate
to smoke (e.g. a pipe); to puff (a cigarette); to burn (incense)
smoked daikon pickles (famous product of Akita Prefecture)
to smoke out (insects, animals, etc.)
smoking (esp. as a means of preserving food)
smoked meat
fumigant
smoked meat
smoked salmon; lox