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Demonstration in Irish (Léirsiú): Meaning, Pronunciation, Usage

‘léirsiú’ also means: illustration

The Irish for demonstration is léirsiú, a masculine noun (plural léirsithe). Ag léirsiú is demonstrating, from the verb léirsigh.
Updated October 2026Report a mistake

How to say “demonstration” in Irish

Irish:
léirsiú
English:
demonstration, illustration
Word type:
noun (verbal noun)
Verbal noun of:
léirsigh, to demonstrate (ag léirsiú, demonstrating)
Gender:
masculine
Pronunciation:
“LAYR-shoo”  /ˈl̠ʲeːɾˠʃuː/
Various forms
Plural:
léirsithe (demonstrations)
Genitive singular:
léirsithe, an léirsithe (e.g. lucht an léirsithe, the people at the demonstration)
Genitive plural:
léirsithe, na léirsithe (e.g. eagraithe na léirsithe, the organisers of the demonstrations)

What does “léirsiú” mean?

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

demonstration
A public protest in which people gather or march to show their support for or opposition to something.Also: protest, march, rally.
1 other meaning: illustration
2illustration
The act of showing or making something clear, such as by an example or a picture; verbal noun of the verb léirsigh in this sense.Also: demonstration, depiction, elucidation.

Other Irish words for demonstration: léiriú (illustration), agóid (protest)

“Léirsiú” as a verbal noun

After ag, léirsiú means demonstrating: it is the verbal noun of the verb léirsigh (to demonstrate). A noun that follows it goes into the genitive.

agat
+
léirsiúverbal noun
=
ag léirsiúdemonstrating

“Léirsiú” with the article

The plural of demonstration in Irish is léirsithe. Here is léirsiú after the article (an t-alt), in the singular and the plural.

an léirsiú
the demonstration
No change after an
na léirsithe
the demonstrations
Plural: no change after na

“Léirsiú” in a sentence: Irish examples

Common Irish sentences using léirsiú, the Irish word for demonstration.

Bhí léirsiú mór i lár na cathrach inné.
There was a big demonstration in the city centre yesterday.
Ghlac na mic léinn páirt sa léirsiú.
The students took part in the demonstration.
Thosaigh an léirsiú taobh amuigh den Dáil.
The demonstration started outside the Dáil.
Bhí na mílte daoine ag léirsithe ar fud na tíre.
Thousands of people were at demonstrations around the country.
Labhair sí ag deireadh an léirsithe.
She spoke at the end of the demonstration.
Eagraíodh léirsithe in aghaidh na cánach nua.
Demonstrations were organised against the new tax.
Bhí na gardaí i láthair ag an léirsiú síochánta.
The police were present at the peaceful demonstration.

Other nouns in Irish

More everyday Irish nouns to learn next.

Demonstration in Irish: frequently asked questions

What is the Irish for demonstration?

The Irish for demonstration is léirsiú (pronounced “LAYR-shoo”). It’s a masculine noun and the plural is léirsithe. Depending on context it can also mean illustration.

How do you pronounce léirsiú in Irish?

Léirsiú is said like “LAYR-shoo” (IPA /ˈl̠ʲeːɾˠʃuː/).

What is the plural of demonstration in Irish?

The plural of léirsiú is léirsithe; with the article, na léirsithe means “the demonstrations”. The genitive plural is léirsithe, as in eagraithe na léirsithe (the organisers of the demonstrations).

Does léirsiú have more than one meaning?

Yes. Léirsiú can mean demonstration or illustration, depending on context; the first is the most common.

What is the difference between léirsiú and léiriú?

Léirsiú is mainly a public demonstration or protest march, while léiriú means a portrayal, production or explanation, as in léiriú drámaíochta, a theatre production.

Is léirsiú the same as agóid?

They overlap: agóid is a protest or objection in general, while léirsiú is the public gathering or march itself.

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