Focal (Word):
innéacs

Roinn chainte (Part of speech): ainmfhocal (noun)
Inscne (Gender): firinscneach (masculine)
Leibhéal (Level): ardleibhéal (advanced)
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Brí (Meaning):
"an index"
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Fuaimniú (Pronunciation):
https://www.teanglann.ie/en/fuaim/inn%C3%A9acs

Foghraíocht (Phonetics):
/iN´e:ks/ (GC)
/iN´æks/ (GU)
/in´e:əks/ (GM)

Fónaic (Phonics):
IN-yehks (GC)
IN-yaks (GU)
in-EH-uks (GM)

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This is a portion of the Focal an Lae (Word of the Day) that I do on my Patreon page. The Patreon version includes declensions of nouns and adjectives and conjugations of verbs, examples of the word in use, related words, confusable words and notes on usage and what to watch out for.
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Múinteoir Gaeilge - Irish Teacher
My "specialty" is Connemara Irish, particularly Cois Fhairrge dialect, but I can also speak Ulster and Munster Irish with native-level pronunciation.
Is fearr Gaeilge ḃriste ná Béarla cliste, cinnte, aċ i ḃfad níos fearr aríst í Gaeilge ḃinn ḃeo na nGaeltaċtaí.
Gaeilge Chonnacht (GC), go háraid Gaeilge Chois Fhairrge (GCF), Gaeilic Uladh (GU), Gaelainn na Mumhan (GM), agus Gaeilge an Chaighdeáin Oifigiúil (CO).

And a slender nn is normally ng in Cork Irish, but there are words where it isn't, and I think a foreign borrowing would be word likely not to have ng. Inniu is pronounced iniubh, without the ng. So yes, I think the pronunciation is as given above, as if inéacs.