出典:Wiktionary
出典:『Wiktionary』 (2026/02/12 18:38 UTC 版)
In Classical Latin, month names were regularly used as adjectives, generally modifying a case-form of mēnsis m sg (“month”) or of one of the nouns used in the Roman calendar to refer to specific days of the month from which other days were counted: kalendae f pl (“calends”), nōnae f pl (“nones”), īdūs f pl (“ides”). However, the masculine noun mēnsis could be omitted by ellipsis, so the masculine singular forms of month names eventually came to be used as proper nouns.
The accusative plural adjective forms Aprīlīs, Septembrīs, Octōbrīs, Novembrīs, Decembrīs are ambiguous in writing, being spelled identically to the genitive singular forms of the nouns; nevertheless, the use of ablative singular forms in -ī and comparison with the usage of other month names as adjectives supports the interpretation of -is as an accusative plural adjective ending in Classical Latin phrases such as "kalendas Septembris".
First/second-declension adjective.
| singular | plural | ||||||
|---|---|---|---|---|---|---|---|
| masculine | feminine | neuter | masculine | feminine | neuter | ||
| nominative | Iānuārius | Iānuāria | Iānuārium | Iānuāriī | Iānuāriae | Iānuāria | |
| genitive | Iānuāriī | Iānuāriae | Iānuāriī | Iānuāriōrum | Iānuāriārum | Iānuāriōrum | |
| dative | Iānuāriō | Iānuāriae | Iānuāriō | Iānuāriīs | |||
| accusative | Iānuārium | Iānuāriam | Iānuārium | Iānuāriōs | Iānuāriās | Iānuāria | |
| ablative | Iānuāriō | Iānuāriā | Iānuāriō | Iānuāriīs | |||
| vocative | Iānuārie | Iānuāria | Iānuārium | Iānuāriī | Iānuāriae | Iānuāria | |
Iānuārius m (genitive Iānuāriī or Iānuārī); second declension
Second-declension noun.
| singular | plural | |
|---|---|---|
| nominative | Iānuārius | Iānuāriī |
| genitive | Iānuāriī Iānuārī |
Iānuāriōrum |
| dative | Iānuāriō | Iānuāriīs |
| accusative | Iānuārium | Iānuāriōs |
| ablative | Iānuāriō | Iānuāriīs |
| vocative | Iānuārī | Iānuāriī |
Found in older Latin (until the Augustan Age).
出典:Wikipedia
出典:『Wikipedia』 (2011/07/02 15:41 UTC 版)
The word "Ianuarius" is the original Roman designation of the month January.