Where does “Irishism” come from?

Irishism (English) comes from English Irish, from Middle English Irisce, from Old English Īras, from Old Norse Írar, from Old Irish Ériu, from Primitive Irish *Īweriū, from Proto-Celtic Φīweryū, from Proto-Indo-European piHweryon- — fat, milk.

Irishism (English): A word, phrase, idiom, or expression chiefly used in Irish English

Definitions

  1. A word, phrase, idiom, or expression chiefly used in Irish English

Ancestry of “Irishism”, step by step

Irishism traces back through two separate lines of ancestry.

via English Irish

StepLanguageWordMeaning
1EnglishIrishThe Goidelic language indigenous to Ireland, also...
2Middle EnglishIrisce
3Old EnglishĪrasIrishmen
4Old NorseÍrarIrishmen
5Old IrishÉriuIreland
6Primitive Irish*Īweriū
7Proto-CelticΦīweryū
8Proto-Indo-EuropeanpiHweryon-
9Proto-Indo-EuropeanpeyH-fat, milk

via English ism

StepLanguageWordMeaning
1EnglishismAn ideology, system of thought, or practice that...
2English-ismUsed to form nouns of action or process or result...
3Latin-ismus-ism
4Ancient Greek-ισμόςForms abstract nouns
5Ancient Greek-μόςForms abstract nouns
6Proto-Indo-European-mósCreates action/result nouns from verb stems
Every word from Proto-Indo-European peyH-