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Old Irish[edit]

Alternative forms[edit]


From Proto-Celtic *kom-teges-nos[1][2].




  1. common, mutual, shared
    • c. 800–825, Diarmait, Milan Glosses on the Psalms, published in Thesaurus Palaeohibernicus (reprinted 1987, Dublin Institute for Advanced Studies), edited and with translations by Whitley Stokes and John Strachan, vol. I, pp. 7–483, Ml. 14d12
      Is coitchen do cechtar de ainm alaili.
      Common to each of them is the name of the other.
    • c. 845, St. Gall Glosses on Priscian, published in Thesaurus Palaeohibernicus (reprinted 1975, Dublin Institute for Advanced Studies), edited and with translations by Whitley Stokes and John Strachan, vol. II, pp. 49–224, Sg. 50a3
      .i. huare nád·n-étada diṅgrae saingnuste dia inni amal adid·chotatsat gnusi doacaldmacha olchenae. patronomica possesiva rl. Aní ba choitchen doaib-sem huili iarum iṡ nomen diles do-som.
      i.e. because it hasn't gotten a special appellation from its meaning as other appellative species have (patronymics, possessives, etc.). What was common to them all [denominativi] then, is a proper name for this [i.e. denominativum].


Singular Masculine Feminine Neuter
Nominative coitchen coitchen coitchen
Vocative coitchin*
Accusative coitchen coitchin
Genitive coitchin coitchine coitchin
Dative coitchiun coitchin coitchiun
Plural Masculine Feminine/neuter
Nominative coitchin coitchena
Vocative coitchenu
Accusative coitchenu
Genitive coitchen
Dative coitchenaib
Notes *modifying a noun whose vocative is different from its nominative

**modifying a noun whose vocative is identical to its nominative
† not when substantivized

Derived terms[edit]


  • Middle Irish: coitchend, coitchenn


Old Irish mutation
Radical Lenition Nasalization
coitchen choitchen coitchen
pronounced with /ɡ(ʲ)-/
Note: Some of these forms may be hypothetical. Not every
possible mutated form of every word actually occurs.

Further reading[edit]


  1. ^ Joseph Vendryes, Lexique Étymologique de l'Irlandais Ancien
  2. ^ T. F. O’Rahilly, Ériu 13:158