*dheu- 1

"a syllogism in which one premise is omitted," in Aristotle, "an inference from likelihoods and signs," 1580s, from Latin enthymema, from Greek enthymema "thought, argument, piece of reasoning," from enthymesthai "to think, consider," literally "to keep in mind, take to heart," from en "in" (see en- (2)) + thymos "spirit, courage, anger, sense" (from PIE root *dheu- (1) "dust, vapor, smoke"). Related: Enthymematic.

also fumet, "excrement, dung of a game animal" (especially a hart), early 15c., fumes, from Old French fumees; the modern ending apparently is a formation in Anglo-French, from fumer, from Latin fumare "to smoke, steam," from fumus "smoke, steam, fume" (from PIE root *dheu- (1) "dust, vapor, smoke"). Related: Fewmets.