Where the record thins

Origin is disputed. Standard reference states that no plausible etymology has been established for θεός. Competing proposals include: derivation from a Proto-Indo-European religious root *dhes- (compare Latin feriae, festus, fanum) that would make θεός an inherited Indo-European formation, and an internal Greek link with the the- set ‘set, establish’ family (θέμις, θεσμός, from PIE *dʰeh1-), sometimes formulated as a formation *dʰh1-s-. A Pre-Greek substrate source has also been suggested. None of these proposals commands consensus; many lexica simply label the etymology ‘unknown’. See Oxford Classical Dictionary on θεός: “No plausible etymology of the word has been proposed.” ([academic.oup.com](https://academic.oup.com/edited-volume/61673/chapter-abstract/548205477?login=false&utm_source=openai)) For the PIE *dhes- proposal see etymonline on theo-, which reconstructs Greek θεός to that root. ([etymonline.com](https://www.etymonline.com/word/theo-?utm_source=openai)) For the internal Greek *dʰeh1- linkage and the form *dʰh1-s- see Etygram’s summary of EDG s.v. θεός; this view is not universally accepted. ([appsweb-cepam.unice.fr](https://appsweb-cepam.unice.fr/etygram/node/1308?utm_source=openai)) Major biblical lexica and summaries often mark the origin as ‘uncertain’ or ‘unknown’. ([biblehub.com](https://biblehub.com/greek/2316.htm?utm_source=openai))