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Examples of Vowel-changes in Genitive Singular.
| 61. | eun, a bird. | |
| SINGULAR. | PLURAL. | |
| Nom. & Acc. | eun | éin |
| Gen. | éin | eun |
| Dat. | eun | eunaiḃ |
| Voc. | a éin | a euna |
| 62. | Fear, a man. | |
| SINGULAR. | PLURAL. | |
| Nom. & Acc. | fear | fir |
| Gen. | fir | fear |
| Dat. | fear | fearaiḃ |
| Voc. | a ḟir | a ḟeara |
N.B.—The gen. of oileán in island is oileáin; of féar, grass, féir; and of fear, a man, fir.
| 63. | Cnoc, a hill. | |
| SINGULAR. | PLURAL. | |
| Nom. & Acc. | cnoc | cnuic |
| Gen. | cnuic | cnoc |
| Dat. | cnoc | cnocaiḃ |
| Voc. | a ċnuic | a ċnoca |
64. The following nouns change ea into ei in genitive singular:—leanḃ, a child; neart, strength; cneas, skin; and ceart, right, justice. (Cnis and cirt are sometimes found as the genitives of cneas and ceart).
