Reconstruction:Proto-Balto-Slavic/jáuˀrāˀ

Etymology
Disputed:
 * Formally matches 🇨🇬, 🇨🇬, presumably from + r-suffix. Favoured by Meillet, Solta, Olsen.
 * Another possibility is origin from reduplicated or metathesized variants of wider attested or . Initial *j- in this case would be due to regular sound change pIE *eu > pBSl *jau in tautosyllabic environment. Potential relatives include 🇨🇬, 🇨🇬, 🇨🇬, 🇨🇬, 🇨🇬, possibly 🇨🇬.
 * Schmidt alternatively considers relation to 🇨🇬.

No Slavic descendants are safely deduced. Superficial match to the related i-stem is dial. 🇨🇬 (for the development 🇨🇬 > 🇨🇬 compare the pronoun ). The fabled names for “Otherworld, Elysium” in a handful of Slavic languages: have been also suggested as possible cognates, however, with lesser certainty. These mythonyms could alternatively be prefixed variants of the Iranian borrowing  (whence 🇨🇬, 🇨🇬, 🇨🇬, 🇨🇬), which Early Slavs believed to be the place where birds migrate during winter. Other theories also exist.
 * East Slavic:
 * West Slavic:
 * West Slavic:
 * West Slavic:
 * West Slavic:

Derksen qualifies the existence of Slavic descendants as "highly uncertain".

Noun

 * 1) body of water (lake, sea), marshland

Descendants

 * East Baltic:
 * West Baltic:
 * West Baltic:
 * West Baltic: