From earlier *-rinos, from Proto-Italic *-zinos, from -nus or from some -r- or -s- stem + -nus. Metanalysis of this suffix led to its free use.
-rnus
First/second-declension adjective.
| singular | plural | ||||||
|---|---|---|---|---|---|---|---|
| masculine | feminine | neuter | masculine | feminine | neuter | ||
| nominative | -rnus | -rna | -rnum | -rnī | -rnae | -rna | |
| genitive | -rnī | -rnae | -rnī | -rnōrum | -rnārum | -rnōrum | |
| dative | -rnō | -rnae | -rnō | -rnīs | |||
| accusative | -rnum | -rnam | -rnum | -rnōs | -rnās | -rna | |
| ablative | -rnō | -rnā | -rnō | -rnīs | |||
| vocative | -rne | -rna | -rnum | -rnī | -rnae | -rna | |