to expose to smoke or fumes, as in disinfecting or exterminating roaches, ants, etc.
Origin: 1520–30; < Latinfūmigātus, past participle of fūmigāre to smoke, fumigate, equivalent to fūm(us) smoke + -igāre (v. suffix based on -ig-, noun derivative of agere to drive, do, as in remex, stem remig- oarsman, hence remigāre to row)
late 14c., "make aromatic smoke as part of a ceremony," from O.Fr. fumigation, from L. fumigationem (nom. fumigatio), from fumigare "to smoke," from fumus "smoke, fume" + root of agere "to drive" (see act). Sense of "expose (someone or something) to aromatic fumes" is c.1400,
originally as a medicinal or therapeutic treatment.
1520s, back formation from fumigation. Related: Fumigated; fumigating.