Why Irish Words Change — Séimhiú, Urú and Tuiseal Ginideach Explained

In this Beginner version of How Irish Nouns Mutate Explained, you’ll learn how Irish nouns change with fully bilingual audio and subtitles - in both Irish and English. We explore some of the most important ways nouns change in Irish, from singular and plural forms to séimhiú, urú, singular, plural, gender, and the genitive case. Discover how Irish nouns change through examples like: 🐱 cat → cait – cat → cats 👩 bean → mná – woman → women 🟩 cat → mo chat – lenition after “mo” 🟦 bád → ár mbád – eclipsis after “ár” 🍎 úll → an t-úll – masculine word 🚪 doras → dorais – noun changes in the genitive case These changes can look confusing at first, but they are a normal part of how Irish works. With practice, you’ll start to recognise the patterns. 📚 Learn at your own pace with our three levels: 🟩 Beginner — fully bilingual audio and subtitles 🟨 Intermediate — Irish audio only, bilingual subtitles 🟧 Advanced — Irish-only audio and subtitles 👉 Watch the other levels here: Intermediate: 🔗 coming soon Advanced: 🔗 coming soon 💚 Subscribe for more videos about the Irish language, grammar, culture, and stories. A Shane Dó Trí – Learn Irish. Chapters 00:00 Irish words can mutate 00:19 Reasons they change? 00:30 Uatha agus Iolra — Singular and Plural 01:36 Irregular Plurals — bean → mná 02:03 Séimhiú — Lenition 03:08 Urú — Eclipsis 04:53 Gender — Inscne 07:17 An Tuiseal Ginideach — The Genitive Case 08:33 Summary 08:53 Conclusion