Used between a velarized ("broad") and a palatalized ("slender") consonant:
⟨abhai⟩, ⟨obhai⟩, ⟨odhai⟩, and ⟨oghai⟩ are used to write /əu̯/ (/oː/ in Ulster)
⟨amhai⟩ is used to write /əu̯/
⟨adhai⟩ and ⟨aghai⟩ are used to write /əi̯/ (/eː/ in Ulster)
⟨aidhe⟩, ⟨aighe⟩, ⟨oidhi⟩, ⟨oidhe⟩, ⟨oighi⟩ and ⟨oidhe⟩ are used to write /əi̯/
⟨omhai⟩ is used to write /oː/
⟨umhai⟩ is used to write /uː/
Used between a slender and a broad consonant:
⟨eabha⟩ and ⟨eobha⟩ used to write /əu̯/ (/oː/ in Ulster)
⟨eamha⟩ is used to write /əu̯/
⟨eadha⟩ and ⟨eagha⟩ are used to write /əi̯/ (/eː/ in Ulster)
⟨eomha⟩ is used to write /oː/
Used between two slender consonants:
⟨eidhi⟩ and ⟨eighi⟩ are used to write /əi̯/: