Editing Irish initial mutations (section)

=== After proclitics ===
==== After the definite article ====
The definite article triggers the lenition of:

# a feminine noun in the nominative singular
#: {{Lang|ga|an '''bh'''ean}} "the woman"
# a masculine noun in the genitive singular
#: {{Lang|ga|an '''fh'''ir}} "of the man" e.g. {{Lang|ga|carr an fhir}}, the man's car (car of the man)
# a noun in the dative singular, when the article follows one of the prepositions {{Lang|ga|de}} "from", {{Lang|ga|do}} "to" or {{Lang|ga|i}} "in"
#: {{Lang|ga|do}} + {{Lang|ga|an}} = {{Lang|ga|don}}: {{Lang|ga|don '''fh'''ear}} "to the man"
#: {{Lang|ga|de}} + {{Lang|ga|an}} = {{Lang|ga|den}}: {{Lang|ga|den '''bh'''ean}} "from the woman"
#: {{Lang|ga|i}} + {{Lang|ga|an}} = {{Lang|ga|sa(n)}}: {{Lang|ga|sa '''ch'''rann}} "in the tree"; {{Lang|ga|san '''fh'''ómhar}} "in the autumn"

[[Lenition#Blocked lenition|Lenition is blocked]] when a [[coronal consonant]] is preceded by {{lang|ga|an}}.

:: {{Lang|ga|an '''d'''eoch}} "the drink", although {{Lang|ga|deoch}} is feminine nominative singular
:: {{Lang|ga|an '''t'''í}} "of the house", although {{Lang|ga|tí}} is masculine genitive singular

Instead of leniting to {{IPA|/h/}}, after the definite article, {{IPA|/sˠ, ʃ/}} become {{IPA|/t̪ˠ, tʲ/}} (written {{vr|ts}}):

:: {{Lang|ga|an '''ts'''úil}} {{IPA|/ən̪ˠ t̪ˠuːlʲ/}} "the eye" (fem. nom. sg.)
:: {{Lang|ga|an '''ts'''aoil}} {{IPA|/ən̪ˠ t̪ˠiːlʲ/}} "of the world" (masc. gen. sg.)

==== After the vocative particle {{Lang|ga|a}} ====

* {{Lang|ga|a '''Bh'''ríd}} "Bríd!"
* {{Lang|ga|a '''Sh'''eáin}} "Seán!"
* {{Lang|ga|a '''ch'''airde}} "my friends!"

==== After possessive pronouns ====
The possessive pronouns that trigger lenition are {{Lang|ga|mo}} "my", {{Lang|ga|do}} "your (sg.)", {{Lang|ga|a}} "his"

* {{Lang|ga|mo '''mh'''ac}} "my son"
* {{Lang|ga|do '''th'''each}} "your house"
* {{Lang|ga|a '''ph'''eann}} "his pen"

==== After certain prepositions ====

* {{Lang|ga|de '''ch'''rann}} "out of a tree"
* {{Lang|ga|faoi '''ch'''rann}} "under a tree"
* {{Lang|ga|mar '''dh'''uine}} "as a person"
* {{Lang|ga|ó '''Ch'''orcaigh}} "from Cork"
* {{Lang|ga|roimh '''mh'''aidin}} "before morning"
* {{Lang|ga|trí '''sh'''ioc agus '''sh'''neachta}} "through frost and snow"
* {{Lang|ga|um '''Ch'''áisc}} "at Easter"
* {{Lang|ga|idir '''fh'''ir agus '''mh'''ná}} "both men and women"
* {{Lang|ga|ar '''bh'''ord}} "on a table"

==== After the preterite/conditional of the [[Irish syntax#The copula is|copula]] ====

* {{Lang|ga|Ba '''dh'''uine mór é.}} "He was a big person."
* {{Lang|ga|Ba '''dh'''eas uait é.}} "That was nice of you."

==== After the preterite preverbal particles ====

* {{Lang|ga|Níor '''mhúinteoir''' é.}} "He was not a teacher."
* {{Lang|ga|Níor '''th'''ug mé}} "I didn't give"
* {{Lang|ga|Ar '''sh'''agart é?}} "Was he a priest?"
* {{Lang|ga|Ar '''th'''áinig sé?}} "Did he come?"

==== After certain preverbal particles ====

* {{Lang|ga|ní '''th'''uigim}} "I don't understand"
* {{Lang|ga|má '''th'''agann sé}} "if he comes"
* {{Lang|ga|an fear a '''th'''abharfaidh dom é}} "the man who will give it to me"

==== A verb in the preterite, imperfect or conditional ====
These were originally preceded by the particle {{Lang|ga|do}} and often still are in Munster.

* {{Lang|ga|'''bh'''ris mé}} "I broke"
* {{Lang|ga|'''bh'''risinn}} "I used to break"
* {{Lang|ga|'''bh'''risfinn}} "I would break"