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Squaring in Irish (Cearnú): Meaning, Pronunciation, Usage

The Irish for squaring is cearnú, a masculine noun. Ag cearnú is squaring, from the verb cearnaigh.
Updated October 2026Report a mistake

How to say “squaring” in Irish

Irish:
cearnú
English:
squaring
Word type:
noun (verbal noun)
Verbal noun of:
cearnaigh, to square (ag cearnú, squaring)
Gender:
masculine
Pronunciation:
“KYAR-noo”  /ˈcaɾˠn̪ˠuː/
Various forms
Genitive singular:
cearnaithe, an chearnaithe (e.g. modh an chearnaithe, the method of squaring)

What does “cearnú” mean?

squaring
The verbal noun of the verb cearnaigh: the act of squaring something, especially multiplying a number by itself or making something square.Also: square, quadrature.

“Cearnú” as a verbal noun

After ag, cearnú means squaring: it is the verbal noun of the verb cearnaigh (to square). A noun that follows it goes into the genitive.

agat
+
cearnúverbal noun
=
ag cearnúsquaring

“Cearnú” with the article

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

an cearnú
the squaring
No change after an

“Cearnú” in a sentence: Irish examples

Common Irish sentences using cearnú, the Irish word for squaring.

Is éard is cearnú ann uimhir a iolrú faoi féin.
Squaring means multiplying a number by itself.
Rinneamar cearnú ar uimhreacha sa rang matamaitice inniu.
We squared numbers in maths class today.
Tá an cearnú éasca má thuigeann tú an t-iolrú.
Squaring is easy if you understand multiplication.
Mhínigh an múinteoir modh an chearnaithe dúinn.
The teacher explained the method of squaring to us.
Is é cearnú a cúig fiche a cúig.
Five squared is twenty-five.
Bhí botún sa chearnú ar an bpáipéar scrúdaithe.
There was a mistake in the squaring on the exam paper.
Úsáid an t-áireamhán don chearnú más maith leat.
Use the calculator for the squaring if you like.

Other nouns in Irish

More everyday Irish nouns to learn next.

Squaring in Irish: frequently asked questions

What is the Irish for squaring?

The Irish for squaring is cearnú (pronounced “KYAR-noo”). It’s a masculine noun.

How do you pronounce cearnú in Irish?

Cearnú is said like “KYAR-noo” (IPA /ˈcaɾˠn̪ˠuː/).

Does cearnú have a plural?

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

Why does cearnú change to chearnú or gcearnú?

Irish changes the start of some words after certain words. After mo (my) cearnú becomes mo chearnú (lenition), and after ár (our) or i (in) it becomes ár gcearnú (eclipsis).

How is cearnú different from cearnóg?

Cearnú is the act of squaring (verbal noun of cearnaigh), while cearnóg is a square, the shape or a town square.

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