HeyRua Get the app

Rational in Irish (réasúnach): Meaning, Forms, Examples

Other uses of ‘réasúnach’: reasonable

The Irish for rational is réasúnach: duine réasúnach, a rational person.
Updated October 2026Report a mistake

How to say “rational” in Irish

Irish:
réasúnach
English:
rational, reasonable
Word type:
adjective
More rational:
níos réasúnaí
Most rational:
is réasúnaí
Plural:
réasúnacha
Pronunciation:
“RAY-soo-nakh”  /ˈreːsˠuːnˠəx/

What does “réasúnach” mean?

“Réasúnach” has two alternative meanings. The most common comes first.

rational
Able to think clearly and logically, or based on reason.Also: reasoning, logical, sensible.
1 other meaning: reasonable
2reasonable
Fair and sensible, not going to extremes.Also: fair, sensible, moderate.

Other Irish adjectives for rational: loighciúil (logical)

“Réasúnach” after a noun

An Irish adjective comes after its noun. Here is réasúnach after duine (person, masculine), after argóint (argument, feminine) and after a plural.

after a masculine nounduine réasúnacha rational person
after a feminine nounargóint réasúnacha rational argument
after a plural noundaoine réasúnacharational people

séimhiú (the h) the ending

plural
daoinepeople
+
réasúnacharational, plural
=
daoine réasúnacharational people

With a plural noun the adjective takes its plural form, réasúnacha.

More rational, most rational, very rational

níosmore
+
réasúnaírational
=
níos réasúnaímore rational
ismost
+
réasúnaírational
=
is réasúnaímost rational

Tá sé níos réasúnaí ná a dheartháir. He is more rational than his brother.

more rationalníos réasúnaíin the past tense: ní ba réasúnaí
most rationalis réasúnaíin the past tense: ba réasúnaí
as rational aschomh réasúnach leno change after chomh
very rationalan-réasúnachan- lenites, except d, t and s
too rationalróréasúnachró- lenites

“Réasúnach” in a sentence: Irish examples

With a masculine noun, a feminine noun, a plural, a comparison and on its own.

Is duine réasúnach é an múinteoir nua.
The new teacher is a rational person.
Thug sí míniú réasúnach dúinn.
She gave us a rational explanation.
Bhí na hargóintí réasúnacha agus soiléir.
The arguments were rational and clear.
Tá sé níos réasúnaí ná a dheartháir.
He is more rational than his brother.
Tá an plean sin réasúnach go leor.
That plan is reasonable enough.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Rational in Irish: frequently asked questions

What is the Irish for rational?

The Irish for rational is réasúnach (pronounced “RAY-soo-nakh”). It comes after the noun: duine réasúnach, a rational person; argóint réasúnach, a rational argument.

How do you say more rational and most rational in Irish?

níos réasúnaí is more rational and is réasúnaí is most rational. In the past tense they become ní ba réasúnaí and ba réasúnaí.

What is the plural of réasúnach?

With a plural noun réasúnach becomes réasúnacha: daoine réasúnacha, argóintí réasúnacha.

How do you say very rational in Irish?

an-réasúnach. Too rational is róréasúnach, and as rational as is chomh réasúnach le.

Does réasúnach have more than one meaning?

Yes. Réasúnach can mean rational or reasonable, depending on context; the first is the most common.

What is the difference between réasúnach and réasúnta?

Réasúnach leans towards 'rational, reasoning', while réasúnta is the everyday word for 'reasonable' or 'fairly', as in praghas réasúnta, a reasonable price.

Learn Irish by
actually speaking it

Learn everyday Irish words like réasúnach through guided conversation with Rua.

7-day free trial. Cancel anytime.

The HeyRua app home screen