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Rationalism in Irish (Réasúnachas): Meaning, Pronunciation, Usage

The Irish for rationalism is réasúnachas, a masculine noun.
Updated October 2026Report a mistake

How to say “rationalism” in Irish

Irish:
réasúnachas
English:
rationalism
Word type:
noun
Gender:
masculine, first declension
Pronunciation:
“RAY-uh-soo-nuh-khus”  /ˈreːsˠuːnˠəxəsˠ/
Various forms
Genitive singular:
réasúnachais, an réasúnachais (e.g. stair an réasúnachais, the history of rationalism)

What does “réasúnachas” mean?

rationalism
The philosophical view that reason, rather than experience or faith, is the main source of knowledge.Also: rationalist philosophy, reason-based thought.

“Réasúnachas” with the article

Here is réasúnachas after the article (an t-alt).

an réasúnachas
the rationalism
No change after an

“Réasúnachas” in a sentence: Irish examples

Common Irish sentences using réasúnachas, the Irish word for rationalism.

Is fealsúnacht é an réasúnachas.
Rationalism is a philosophy.
Bhí Descartes ar dhuine de cheannródaithe an réasúnachais.
Descartes was one of the pioneers of rationalism.
Rinneamar staidéar ar réasúnachas san ollscoil.
We studied rationalism at university.
Cuireann an réasúnachas béim ar an réasún.
Rationalism puts emphasis on reason.
Tá suim mhór aici i réasúnachas na hEorpa.
She is very interested in European rationalism.
Scríobh sé aiste faoi theorainneacha an réasúnachais.
He wrote an essay about the limits of rationalism.
Is minic a chuirtear réasúnachas i gcodarsnacht le heimpíreachas.
Rationalism is often contrasted with empiricism.

Other nouns in Irish

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Rationalism in Irish: frequently asked questions

What is the Irish for rationalism?

The Irish for rationalism is réasúnachas (pronounced “RAY-uh-soo-nuh-khus”). It’s a masculine noun.

How do you pronounce réasúnachas in Irish?

Réasúnachas is said like “RAY-uh-soo-nuh-khus” (IPA /ˈreːsˠuːnˠəxəsˠ/).

Does réasúnachas have a plural?

No plural form is given for réasúnachas in the standard. Many abstract and mass nouns in Irish have no plural.

How is réasúnachas related to réasún?

Réasúnachas, rationalism, is built from réasún, reason, with the abstract suffix -achas, just as English adds -ism.

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