Editing Irish initial mutations (section)

==Environments of Eclipsis {{anchor|Eclipsis}}==<!--This section is linked from [[Manx language]]-->
[[File:Boat_Slip_sign.jpg|thumb|Eclipsis displayed on a sign in [[Tramore]]: {{Lang|ga|Fánán na mBád}} "[[Slipway|slip]] of the boats". Even in an [[all-caps]], the eclipsed letter is not capitalised.]]
[[File:Street_sign_Irish_Row,_Raphoe_-_geograph.org.uk_-_4086612.jpg|thumb|Eclipsis displayed on a sign in [[Raphoe]]: {{Lang|ga|Sráith na nGael}} "Row of the [[Gael|Gaels]]".]]

=== After plural possessive pronouns ===
The possessive pronouns that trigger eclipsis are {{Lang|ga|ár}} "our", {{Lang|ga|bhur}} "your (pl.)", {{Lang|ga|a}} "their"

* {{Lang|ga|ár '''gc'''airde}} "our friends"
* {{Lang|ga|bhur '''bp'''áistí}} "your (pl.) children"
* {{Lang|ga|a '''mb'''ád}} "their boat",

{{Lang|ga|a}} can mean "his", "her" or "their", but these different uses can still be distinguished, since {{Lang|ga|a}} causes lenition when used as "his" ({{Lang|ga|a bhád}}), causes eclipsis when used as "their" ({{Lang|ga|a mbád}}), and neither when used as "her" ({{Lang|ga|a bád}}).

=== After certain numbers ===
The numbers that trigger eclipsis (the noun being in the singular) are:

* {{Lang|ga|seacht '''gc'''apall}} "seven horses"
* {{Lang|ga|ocht '''n-'''asal}} "eight donkeys"
* {{Lang|ga|naoi '''gc'''at}} "nine cats"
* {{Lang|ga|deich '''bp'''eann}} "ten pens"

=== After the preposition {{Lang|ga|i}} "in" ===
Before a vowel {{Lang|ga|in}} is written instead of {{Lang|ga|i n-}}.

* {{Lang|ga|i '''dt'''each}} "in a house"
* {{Lang|ga|in Éirinn}} "in Ireland"

=== Genitive plural nouns after the definite article ===
The genitive plural article {{Lang|ga|na}} eclipses a following noun:

* {{Lang|ga|na '''n-'''asal}} "of the donkeys"
* {{Lang|ga|na '''bhf'''ocal}} "of the words"

=== Dative singular nouns after the definite article ===
In western and southern dialects, nouns beginning with a noncoronal consonant are eclipsed after combinations of preposition + article in the singular (except {{Lang|ga|den}}, {{lang|ga|don}}, and {{Lang|ga|sa(n)}}, which trigger lenition)

* {{Lang|ga|ag an '''bhf'''ear}} "by the man"
* {{Lang|ga|ar an '''gc'''rann}} "on the tree"

=== After certain preverbal particles ===
* {{Lang|ga|an poll a '''dt'''agann na coiníní as}} "the hole that the rabbits come out of"
* {{Lang|ga|An '''dt'''agann sé gach lá?}} "Does he come every day?"
* {{Lang|ga|Cá '''bhf'''uil mo spéaclaí?}} "Where are my glasses?"
* {{Lang|ga|Dúirt sé go '''dt'''iocfadh sé.}} "He said that he would come."
* {{Lang|ga|dá '''mb'''eadh a fhios sin agam}} "if I had known that"