出典:Wiktionary
出典:『Wiktionary』 (2025/12/01 17:10 UTC 版)
From Latin rubidus.
rubidus (plural rubiduses)
From Proto-Indo-European *h₁rewdʰ- (“red”) + -idus. The different ablaut grade from rubeō suggests that the adjective is not directly derived from the stative verb. Probably most closely related to rōbus and rōbīgō.
First/second-declension adjective.
| singular | plural | ||||||
|---|---|---|---|---|---|---|---|
| masculine | feminine | neuter | masculine | feminine | neuter | ||
| nominative | rūbidus | rūbida | rūbidum | rūbidī | rūbidae | rūbida | |
| genitive | rūbidī | rūbidae | rūbidī | rūbidōrum | rūbidārum | rūbidōrum | |
| dative | rūbidō | rūbidae | rūbidō | rūbidīs | |||
| accusative | rūbidum | rūbidam | rūbidum | rūbidōs | rūbidās | rūbida | |
| ablative | rūbidō | rūbidā | rūbidō | rūbidīs | |||
| vocative | rūbide | rūbida | rūbidum | rūbidī | rūbidae | rūbida | |
From rubeō and -idus. Appears to have a different meaning from rūbidus. Attested since the 1st century AD alongside the proliferation of derived color terms with -idus.
First/second-declension adjective.
| singular | plural | ||||||
|---|---|---|---|---|---|---|---|
| masculine | feminine | neuter | masculine | feminine | neuter | ||
| nominative | rubidus | rubida | rubidum | rubidī | rubidae | rubida | |
| genitive | rubidī | rubidae | rubidī | rubidōrum | rubidārum | rubidōrum | |
| dative | rubidō | rubidae | rubidō | rubidīs | |||
| accusative | rubidum | rubidam | rubidum | rubidōs | rubidās | rubida | |
| ablative | rubidō | rubidā | rubidō | rubidīs | |||
| vocative | rubide | rubida | rubidum | rubidī | rubidae | rubida | |