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Infinity in Irish (Éigríoch): Meaning, Pronunciation, Usage

‘éigríoch’ also means: boundless expanse

The Irish for infinity is éigríoch, a feminine noun.
Updated October 2026Report a mistake

How to say “infinity” in Irish

Irish:
éigríoch
English:
infinity, boundless expanse
Word type:
noun
Gender:
feminine, second declension
Pronunciation:
“AY-gree-ukh”  /ˈeːɟɾʲiːəx/
Various forms
Genitive singular:
éigríche, na héigríche (e.g. coincheap na héigríche, the concept of infinity)

What does “éigríoch” mean?

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

infinity
A state or quantity without any end or limit, as in mathematics or space.Also: boundlessness, endlessness, the infinite.
1 other meaning: boundless expanse
2boundless expanse
A limitless distance or region, used poetically for something without boundaries.Also: limitless space, the endless distance.

“Éigríoch” with the article

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

an éigríoch
the infinity
No change: feminine nouns starting with a vowel keep their form after an

“Éigríoch” in a sentence: Irish examples

Common Irish sentences using éigríoch, the Irish word for infinity.

Is coincheap deacair í an éigríoch.
Infinity is a difficult concept.
Síneann an spás go héigríoch, dar leo.
Space stretches to infinity, they say.
Labhair an múinteoir faoin éigríoch sa rang matamaitice.
The teacher spoke about infinity in maths class.
Tá siombail na héigríche cosúil le hocht ar a taobh.
The symbol for infinity looks like an eight on its side.
Bhí an fharraige ag síneadh amach san éigríoch.
The sea was stretching out into infinity.
Ní féidir éigríoch a chomhaireamh.
You cannot count infinity.
Smaoinigh mé ar mhéid na héigríche agus mé ag féachaint ar na réaltaí.
I thought about the vastness of infinity while looking at the stars.

Other nouns in Irish

More everyday Irish nouns to learn next.

Infinity in Irish: frequently asked questions

What is the Irish for infinity?

The Irish for infinity is éigríoch (pronounced “AY-gree-ukh”). It’s a feminine noun. Depending on context it can also mean boundless expanse.

How do you pronounce éigríoch in Irish?

Éigríoch is said like “AY-gree-ukh” (IPA /ˈeːɟɾʲiːəx/).

Does éigríoch have a plural?

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

Does éigríoch have more than one meaning?

Yes. Éigríoch can mean infinity or boundless expanse, depending on context; the first is the most common.

Why does éigríoch sometimes have a t or h in front of it?

Irish nouns beginning with a vowel take a prefix after certain words: an éigríoch (the infinity), a héigríoch (her infinity), a n-éigríoch (their infinity).

How is 'éigríoch' related to 'críoch'?

It is formed from the negative prefix 'éi-' plus 'críoch' (end, limit), so 'éigríoch' literally means 'no end'. The adjective is 'éigríochta', infinite.

How do I say 'to infinity' in Irish?

You can say 'go héigríoch', for example 'síneann sé go héigríoch', it stretches to infinity.

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