See Irish phonology for an explanation of the symbols used and Irish initial mutations for an explanation of eclipsis.
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Its negated form is mura and causes eclipsis.
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For example, neuter nouns still trigger eclipsis of a following complement, as they did in Middle Irish, but less consistently.
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Ulster Irish has the same two initial mutations, lenition and eclipsis, as the other two dialects and the standard language, and mostly uses them the same way.
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More examples
Ellipsis: omission or suppression of parts of words or sentences
Irish, like all modern Celtic languages, is characterized by its initial consonant mutations. These mutations affect the initial consonant of a word under specific morphological and syntactic conditions. ...
An omission of words needed to fully express the sense of a phrase; A line or dash used to show that text has been omitted; The suppression of the sounds of certain radical consonants in place of others
(Greek "leaving out," cf. Modern English eclipse): A type of enallage in which an author or poet omits essential grammatical elements to create a poetic or artful effect. One example might be the following: "This sentence no verb! ...