From Proto-Celtic *roudos (compare Welsh rhudd), from Proto-Indo-European *h₁rewdʰ- (compare Ancient Greek ἐρυθρός (eruthrós), Sanskrit रुधिर (rudhirá), Old English rēad).
rúad
| o/ā-stem | |||
|---|---|---|---|
| Singular | Masculine | Feminine | Neuter |
| Nominative | rúad | rúad | rúad |
| Vocative | rúaid* rúad** | ||
| Accusative | rúad | rúaid | |
| Genitive | rúaid | rúaide | rúaid |
| Dative | rúad | rúaid | rúad |
| Plural | Masculine | Feminine/neuter | |
| Nominative | rúaid | rúada | |
| Vocative | rúadu rúada† | ||
| Accusative | rúadu rúada† | ||
| Genitive | rúad | ||
| Dative | rúadaib | ||
| Notes | *modifying a noun whose vocative is different from its nominative **modifying a noun whose vocative is identical to its nominative | ||
| radical | lenition | nasalization |
|---|---|---|
| rúad also rrúad after a proclitic ending in a vowel |
rúad pronounced with /r(ʲ)-/ |
unchanged |
Note: Certain mutated forms of some words can never occur in Old Irish.
All possible mutated forms are displayed for convenience.