- *-e- (after a soft consonant)
(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)
*-o-
- used in compound words; -o-
- *čьrnъ (“black”) + *-o- + *bylь (“plant, herb”) → *čьrnobylь (“mugwort”)
- *bělъ (“white”) + *-o- + *golvъ (“headed”) → *bělogolvъ (“white headed”)
- *dobrъ (“good”) + *-o- + *mirъ (“peace”) → *Dobromirъ (given name)
- East Slavic:
- Old East Slavic: -о- (-o-)
- Middle Russian: -о- (-o-)
- Old Ruthenian: -о- (-o-)
- Belarusian: (stressed) -о- (-o-), (unstressed) -а- (-a-)
- Carpathian Rusyn: -о- (-o-)
- Ukrainian: -о- (-o-)
- Old Novgorodian: -о- (-o-)
- South Slavic:
- Old Church Slavonic:
- Old Cyrillic script: -о- (-o-)
- Glagolitic script: -ⱁ- (-o-)
- Church Slavonic: -о- (-o-)
- Bulgarian: -о- (-o-)
- Macedonian: -о- (-o-)
- Serbo-Croatian:
- Cyrillic script: -о-
- Latin script: -o-
- Slovene: -o-
- West Slavic:
- Old Czech: -o-
- Old Polish: -o-
- Polabian: -ü-
- Pomeranian:
- Kashubian: -o-
- Slovincian: -ô-
- Slovak: -o-
- Sorbian:
- Lower Sorbian: -o-
- Upper Sorbian: -o-