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Multiplication in Irish (Iolrú): Meaning, Pronunciation, Usage

‘iolrú’ also means: increase · pluralization

The Irish for multiplication is iolrú, a masculine noun. Ag iolrú is multiplying, from the verb iolraigh.
Updated October 2026Report a mistake

How to say “multiplication” in Irish

Irish:
iolrú
English:
multiplication, increase, pluralization
Word type:
noun (verbal noun)
Verbal noun of:
iolraigh, to multiply (ag iolrú, multiplying)
Gender:
masculine
Pronunciation:
“UL-roo”  /ˈɪl̪ˠɾˠuː/
Various forms
Genitive singular:
iolraithe, an iolraithe (e.g. tábla iolraithe, multiplication table)

What does “iolrú” mean?

“Iolrú” has three alternative meanings. The most common comes first.

multiplication
The act of multiplying, especially in arithmetic; it is the verbal noun of the verb iolraigh.Also: multiplying, multiply.
2 other meanings: increase or pluralization
2increase
A growth in number or amount, the process of becoming more numerous.Also: proliferation, multiplying.
3pluralization
The forming of the plural of a word in grammar.Also: pluralisation, plural formation.

Other Irish words for multiplication: iomadú (multiplication)

“Iolrú” as a verbal noun

After ag, iolrú means multiplying: it is the verbal noun of the verb iolraigh (to multiply). A noun that follows it goes into the genitive.

agat
+
iolrúverbal noun
=
ag iolrúmultiplying

“Iolrú” with the article

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

an t-iolrú
the multiplication
Masculine nouns take t before a vowel after an

“Iolrú” in a sentence: Irish examples

Common Irish sentences using iolrú, the Irish word for multiplication.

Tá iolrú deacair do na páistí óga.
Multiplication is hard for the young children.
Foghlaimímid an t-iolrú sa rang matamaitice.
We learn multiplication in maths class.
Chuir an múinteoir tábla iolraithe ar an mballa.
The teacher put a multiplication table on the wall.
Bhí botún san iolrú a rinne mé.
There was a mistake in the multiplication I did.
Is maith liom iolrú níos mó ná roinnt.
I like multiplication more than division.
Úsáidtear an comhartha iolraithe idir an dá uimhir.
The multiplication sign is used between the two numbers.
Déan iolrú ar an dá uimhir sin.
Multiply those two numbers.

Other nouns in Irish

More everyday Irish nouns to learn next.

Multiplication in Irish: frequently asked questions

What is the Irish for multiplication?

The Irish for multiplication is iolrú (pronounced “UL-roo”). It’s a masculine noun. Depending on context it can also mean increase or pluralization.

How do you pronounce iolrú in Irish?

Iolrú is said like “UL-roo” (IPA /ˈɪl̪ˠɾˠuː/).

Does iolrú have a plural?

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

Does iolrú have more than one meaning?

Yes. Iolrú can mean multiplication, increase or pluralization, depending on context; the first is the most common.

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

Irish nouns beginning with a vowel take a prefix after certain words: an t-iolrú (the multiplication), a hiolrú (her multiplication), a n-iolrú (their multiplication).

What are the four basic arithmetic operations in Irish?

They are suimiú (addition), dealú (subtraction), iolrú (multiplication) and roinnt (division).

How is iolrú related to iolra?

Both come from the idea of 'many': iolra means the plural in grammar, while iolrú is multiplying, from the verb iolraigh.

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