Rosie_Oleary wrote:
Hi! I’m trying to understand and memorize all the lenition rules for Standard Irish. So far, I’m making progress and having great success… but I’m a tad bit stuck…
According to
http://www.nualeargais.ie/gnag/subst2.htm#genitivlen , indefinite genitive nouns after masculine nouns (ending w/a slender consonant) that are also in the genitive themselves, are lenited.
E.g. an fhir chéile (of the husband).
teach pobail bhaile (a church of a town).
But, AN CAIGHDEÁN OIFIGIÚIL states…
Ní shéimhítear ainmfhocal éiginnte atá faoi réir ag ainmfhocal atá sa tuiseal ginideach.
(An indefinite noun subject to a noun in the genitive case is not lenited. [I had to use Google translate])
I trust both sources, but they appear to contradict each other… is there something I’m not understanding?
And, also, according to AN CAIGHDEÁN OIFIGIÚIL, singular indefinite genitives starting with f are not lenited…if Nualeargais ends up being correct regarding my first question, does this f rule apply in those cases too?
And, lastly,
http://www.nualeargais.ie/gnag/lenition.htm states that to avoid side-by-side genitives, the first genitive is lenited and remains in nominative, while the second is genitive and unlenited…then why is it “teach pobail bhaile”…instead of “teach phobal baile”?
Sorry for the barrage of questions…just really wanna understand. Thank you to anyone who knows!

Graiméar Gaeilge na mBráithre Críostaí: (relevant part in bold)
Lenition after masculine genitive (e.g. an fhir chéile)
Quote:
4.14 Séimhítear tuiseal ginideach ainmfhocail éiginnte nó ainm briathartha atá faoi réir
ag ainmfhocal eile nuair is ainmfhocal iolra dar críoch consan caol an chéad ainmfhocal:
buidéil bhainne; éisc mhara; faochain chapaill, nó nuair a chaolaítear san uatha consan
deiridh an chéad ainmfhocail trí infhilleadh: toirtín aráin choirce; sárú gealltanais phósta.
I bpáirt den Ghaeltacht séimhítear ainmfhocal atá faoi réir ag ainmfhocal eile, i bhfrása seanbhunaithe, d'ainneoin nach gcaolaítear an chéad ainmfhocal san infhilleadh: gloine,(braon, deochanna) uisce bheatha (ar nós mac Giolla Bhríde). Ach ní athraíonn seo substaint na rialach
Lenition of f:
Quote:
4.16 Ainneoin a bhfuil ráite in 4.14, ní gnách séimhiú ar ghinideach ainmfhocail
éiginnte nó ainm bhriathartha atá faoi réir ag ainmfhocal eile sna cásanna seo:
- ar d, s, t ar lorg d, l, n, s, t, ach i gcorrchás: bean siúil; cos deiridh; slat tiomána;
tonn tuile; min seagail; beirt sagart ach maidin shamhraidh (sheaca); ná ar f tosaigh, mar gur
féidir le séimhiú cuma éiginnte nó ait a chur ar an mbunfhocal sa chaint: deoir fola [fhola nó
ola], ach an ghlóir fhlaithiúnais
You don't say
deoir fhuisce (because it sounds like
deoir uisce), so:
deoir fuisce"then why is it “teach pobail bhaile”…instead of “teach phobal baile”?"
As David said:
teach pobail baile - teach pobail is a term on its own (an "ionad brí", "meaning unit", as they call it in the CO).
So, it is helpful to use brackets for such "units" and colors for case (
genitive form)
[[teach
pobail]
baile] = a town church ([teach
pobail] = church + [
baile] = town)
if "pobal baile" would be such a meaning unit (e.g. "town congregation"):
You can avoid a double genitive and pobal is still in nominative form:
[teach [pobal
baile]] = a house of a town congregation
teach is nominative masculine, so no lenition, I'd say. (only difference: pobail vs. pobal)
But you can alternatively put pobal in [pobal baile] in genitive form, so:
[teach [
pobail bhaile]] = a house of a town congregation
In case of a feminine noun, [oifig]:
[oifig [phobal
baile]] = an office of a town congregation
or
[oifig [
phobail bhaile]] = an office of a town congregation