fumigation (n.)

late 14c., "action of making aromatic smoke as part of a ceremony," from Latin fumigationem (nominative fumigatio) "a smoking," noun of action from past-participle stem of fumigare "to smoke," from fumus "smoke, fume" (from PIE root *dheu- (1) "dust, vapor, smoke") + root of agere "to set in motion, to do, perform" (from PIE root *ag- "to drive, draw out or forth, move"). Sense of "exposure (of someone or something) to aromatic fumes" is c. 1400, originally as a medicinal or therapeutic treatment.

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