Etymology
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*kand- 
also *kend-, Proto-Indo-European root meaning "to shine."

It forms all or part of: candela; candelabrum; candescent; candid; candidate; candle; candor; chandelier; chandler; frankincense; incandescence; incandescent; incendiary; incense (n.) "substance producing a sweet smell when burned;" incense (v.1) "to provoke, anger."

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit cand- "to give light, shine," candra- "shining, glowing, moon;" Greek kandaros "coal;" Latin candere "to shine;" Welsh cann "white," Middle Irish condud "fuel."
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*dheu- (1)

Proto-Indo-European root meaning "dust, vapor, smoke." 

It forms all or part of: enthymeme; fewmet; fume; fumigation; funk; perfume; sfumato; typhoid; typhoon; typhus.

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit dhuma- "smoke, fume;" Greek thymos "spirit, courage, anger," thymiao "fumigate," thymin "incense;" Latin fumus "smoke, steam, fume;" Lithuanian dūmai "smoke" (plural); Old Prussian dumis "smoke;" Old Church Slavonic dymu "smoke;" Middle Irish dumacha "fog;" perhaps Old High German toum "steam, vapor."

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