FromProto-Italic*-jōs, fromProto-Indo-European*-yōs, for original**-yoss, i.e. thes-stem*-yos- with masculine nominative*-s. Theō from the nominative case was made common to all cases. Afterwards nom.sg.-iōr >-ior, byLatin sound laws. Thus paradoxically, as in ther-stems (soror,-tor,-or), in the resulting paradigm the one form with a short stem vowel is the only form whose stem was etymologically long.[1]
-ior m orf (neuter-ius);third declension
Third-declension comparative adjective.
| singular | plural | ||||
|---|---|---|---|---|---|
| masc./fem. | neuter | masc./fem. | neuter | ||
| nominative | -ior | -ius | -iōrēs | -iōra | |
| genitive | -iōris | -iōrum | |||
| dative | -iōrī | -iōribus | |||
| accusative | -iōrem | -ius | -iōrēs -iōrīs | -iōra | |
| ablative | -iōre -iōrī | -iōribus | |||
| vocative | -ior | -ius | -iōrēs | -iōra | |
-ior m (plural-iori,feminine-ioară,feminine plural-ioare)
The "i" sometimes leads to the palitalization of the previous consonant and gets subsequently deleted.