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88. Ai, unaccented: a is a glide, and i the vowel (in Ulster, Munster and Connaught).
| obair | ċonnaic | feadair |
| capaill | laḃair | leaḃair |
| socair | Gobnait | seasaiṁ |
UI.
89. In this digraph the “u” is always the glide and the “i” the vowel (in Connaught and Munster).
| buile | buille | cluig |
| cuisle | cnuic | cuilm |
| cuid | cluiṫċe | cuir |
| fuil | fuinneog | guiḋ |
| guirt | guirm | Muire |
| muin | muir | muirġin |
| muileann | Muiris | luisne |
| guib | duine | puirt |
| ruip | tuit | uisce |
(a) In Ulster “u” of the digraph “ui” is often the vowel, and “i” the glide: muinntir, fuinneog, fuinnseog, fuiseog, cuid, cuisle, buideal, buinim, &c. In the following words “i” is the vowel: uisce, uilig, tuile, druim, ruibe, duine, cuiṁne, cruinn, tuig, duilleog, &c. (Craig).
90. When Ui is followed by a protected liquid, or by ḃ, ṁ, Ġ, Ḋ, + a vowel or liquid, the “u” remains a mere glide, but the “i” is lengthened to í.
| Muiṁneaċ | buiḋe | dliġe |
| druim | sliġe | suim |
| luiḃeanna | suiḋe | luiġe |
