Reconstruction:Proto-Indo-European/-os

Descendants

 * (s-stem nouns)
 * (z-stem nouns)
 * (s-stem nouns)
 * (< alternative locative form *-esen)
 * (s-stem nouns)
 * Proto-Indo-Iranian: *-as
 * (< locative ending *-esi)
 * , -erī
 * (s-stem nouns)
 * Proto-Indo-Iranian: *-as
 * (< locative ending *-esi)
 * , -erī
 * (< locative ending *-esi)
 * , -erī
 * (< locative ending *-esi)
 * , -erī

Reconstruction notes
This type of thematic action noun, with stress on the first o-grade vowel, is known as the -type nouns in the literature.

Related terms

 * *(o)-ós
 * *(o)-éh₂

Descendants

 * Anatolian:
 * Hittite: a-stem nouns
 * Proto-Balto-Slavic: o-stem nouns
 * Proto-Germanic: a-stem nouns
 * Proto-Hellenic: o-stem nouns
 * Ancient Greek: τόμος-type nouns
 * Proto-Indo-Iranian: a-stem nouns
 * Proto-Italic: o-stem nouns
 * Proto-Italic: o-stem nouns