出典:Wiktionary
出典:『Wiktionary』 (2025/06/12 20:16 UTC 版)
Ultimately from the adjective-forming suffix -(i)nus; see also -rnus. Szemerényi 1959 proposes that the starting point was pre-Latin *hesterinos (hesternus) and *wesperinos (reconstructed based on the obsolete word vesperna). As a result of rebracketing, the *-erinos at the end of these words would have been attached to *diw- and *nokt-, the pre-Latin roots of the words diēs (“day”) and nox (“night”), initially forming *diw-erinos and *nokt-erinos. Szemerényi argues that *diw-erinos was syncopated to *diwrinos and then regularly developed to *diurnos (Latin diurnus), and then the ending *-urnos was extended by analogy to nocturnus and other words. Others have argued that the adjectives may have been formed on or influenced by the adverbs diū/diūs (“by day”) and noctū (“at night”).
First/second-declension adjective.
| singular | plural | ||||||
|---|---|---|---|---|---|---|---|
| masculine | feminine | neuter | masculine | feminine | neuter | ||
| nominative | -urnus | -urna | -urnum | -urnī | -urnae | -urna | |
| genitive | -urnī | -urnae | -urnī | -urnōrum | -urnārum | -urnōrum | |
| dative | -urnō | -urnae | -urnō | -urnīs | |||
| accusative | -urnum | -urnam | -urnum | -urnōs | -urnās | -urna | |
| ablative | -urnō | -urnā | -urnō | -urnīs | |||
| vocative | -urne | -urna | -urnum | -urnī | -urnae | -urna | |