- Proto-Hind-Ewropaki ra *dheu- ("to rise in cloud as dust, vapor, or smoke") > *dhumo- ("dûn")
- Proto-Aryaki ra
- Avarki: dunman- ("hewr")
- Pehlewki: dūt ("dûn")
- Partki: dwd ("dûn")
- Farski: dūd ("dûn")
- Kurmancki: dū ("dûn")
- Belaruski: dūt ("dûn")...
- (Zazaki: dūn) Alfabeyê Ariki
- Sanskritki: dhūmā- ("dûn")
- Yunanki: thumos ("rıh")
- Latinki: fumus ("dûn") ...
- Çıme: Horn p.129, Watkins p.19, Etymonline | Pokorny: 261 - 267
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