ar son

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See also: arson



Disputed; there are two Old Irish nouns son, one meaning ‘sound; word, name’ (a borrowing from Latin sonus), and one meaning ‘prosperity, well-being’ (cognate with sona (happy) and sonus (good fortune)). The Dictionary of the Irish Language associates the preposition with the first of these, suggesting the original meaning ‘at the sound of, by the word/name of’. Dinneen’s and Ó Dónaill’s dictionaries, on the other hand, associate it with the second, suggesting the original meaning ‘for the well-being of’. Cognate with Scottish Gaelic airson.



ar son (plus genitive or possessive determiner, triggers no mutation)

  1. for, for the sake of (because of)
  2. on behalf of (speaking or acting for)