Bríd posted the word of the day, abhaile, town as an adverb. Someone please help me to understand in what context, home is use as an adverb.

Bríd posted abhaile "home" adverb. This is used as in Tá mé ag dul abhaile anois. "I'm going home now."

"At home" is sa bhaile (or sa mbaile in Connemara).

Abhaile is certainly related to baile, which can mean both "home" and "town", probably from Old French under the Normans. from Old Irish baile "place, homestead, town, city".

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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).

Grma a Breandán.

Baile - can be "home" or "town", you will know from context.

Abhaile - is "home" only.

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It is recommended that you always wait for three to agree on a translation.
I speak Connemara Irish, and my input will often reflect that.
I will do an mp3 file on request for short translations.
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abhaile means homeward and is therefore an adverb since it tells us more about the verb.

Chuaigh mé abhaile - I went towards home (homeward)
Shroich mé abhaile / Bhí mé abhaile can't be used and don't make sense, as I understand it.

Btw not everybody uses "abhaile", it's mainly Munster and Connachta, I think.
In Ulster at least, people use "chun an bhaile" (pronounced "na bhaile") instead.

Chuaigh mé 'na' bhaile = I went home.
D'fhan mé sa bhaile = I stayed at home.

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Is fearr Gaeilg na Gaeltaċta ná Gaeilg ar biṫ eile
Agus is í Gaeilg Ġaoṫ Doḃair is binne

I don't think that abhaile and baile would have anything to do with Norman French, as far as I know. The only word that I think you could connect to the French that's similar in Irish is - báille - which would come from bailli (bailiff) and that is very definitely Norman and I've explained it before.

Leis an fhírinne a ráidht tá 'n focal "baile" giota beag cosúil leis an fhocal "ville" ach chan dóigh liom go bhfuil lá bainte eatarthu...

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Is fearr Gaeilg na Gaeltaċta ná Gaeilg ar biṫ eile
Agus is í Gaeilg Ġaoṫ Doḃair is binne

Thanks franc, fixed above.

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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).