The word according to the dictionary

This Proto-Indo-Iranian entry contains reconstructed terms and roots. As such, the term(s) in this entry are not directly attested, but are hypothesized to have existed based on comparative evidence.

Proto-Indo-Iranian

Etymology

From Proto-Indo-European *deywós.

Noun

*daywás m

(religion) god

Declension

masculine a-stem
	singular	dual	plural
nominative	*daywás	*daywā́(w)	*daywā́s(as)
vocative	*dáywa	*dáywā(w)	*dáywās(as)
accusative	*daywám	*daywā́(w)	*daywā́ns
instrumental	*daywáH	*daywáybʰyā(m)	*daywā́yš
ablative	*daywā́t	*daywáybʰyā(m)	*daywáybʰyas
dative	*daywā́y	*daywáybʰyā(m)	*daywáybʰyas
genitive	*daywásya	*daywáyās	*daywā́naHam
locative	*daywáy	*daywáyaw	*daywáyšu

Coordinate terms

*Hásuras

Descendants

Proto-Indo-Aryan: *daywás (“god, deity”)
- Sanskrit: देव (devá) (see there for further descendants)
Proto-Iranian: *daywáh (“demon”) (see there for further descendants)
Proto-Nuristani: *dewá
- Northern Nuristani:
  - Kamkata-viri:
    Kamviri: dé
    
    Kativiri: dé
  - Prasuni: lú
- Southern Nuristani:
  - Ashkun: deí
  - Waigali: de
→ Proto-Finnic: *taivas (“sky”) (see there for further descendants)

References

^ Goto, Toshifumi (2013) Old Indo-Aryan Morphology and its Indo-Iranian Background (Veroffentlichungen zur Iranistik; 60)‎, Vienna: Austrian Academy of Sciences Press, →ISBN, § 1.2.3. -ī- stem, page 22: “*dai̯u̯á-”

[Goto-1] Goto, Toshifumi (2013) Old Indo-Aryan Morphology and its Indo-Iranian Background (Veroffentlichungen zur Iranistik; 60)‎, Vienna: Austrian Academy of Sciences Press, →ISBN, § 1.2.3. -ī- stem, page 22: “*dai̯u̯á-”