Where does “ionadaigh” come from?

ionadaigh (Irish) comes from Irish -igh, from Old Irish -igidir, from Proto-Celtic *-sagyetor — denominative/causative suffix.

ionadaigh (Irish): to substitute, replace; to represent; vocative...

Definitions

  1. to substitute, replace; to represent; vocative...

Ancestry of “ionadaigh”, step by step

StepLanguageWordMeaning
1Irish-ighSuffix used to form verbs from nouns;...
2Old Irish-igidira suffix used to form verbs from nouns and...
3Proto-Celtic*-sagyetordenominative/causative suffix
Every word from Proto-Celtic *-sagyetor →Every word from Irish -igh →Every word from Old Irish -igidir →