Reconstruction:Proto-Italic/reis

Etymology
From.

Noun

 * 1) thing, matter

Declension
Originally, the noun was a "regular" i-stem, and would have been before vowels (genitive, dative  etc.), and  before consonants and word-finally (nominative , perhaps originally disyllabic). In the former, -j- was regularly lost, while in the latter the diphthong was shortened before another consonant, due to Osthoff's law.

Descendants

 * (genitive singular)
 * (genitive singular)