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Catalyst in Irish (Catalaíoch): Meaning, Pronunciation, Usage

‘catalaíoch’ also means: catalytic

The Irish for catalyst is catalaíoch, a masculine noun (plural catalaígh).
Updated October 2026Report a mistake

How to say “catalyst” in Irish

Irish:
catalaíoch
English:
catalyst
Word type:
noun
Gender:
masculine
Pronunciation:
“KAT-uh-lee-ukh”  /ˈkat̪ˠəlˠiːəx/
Various forms
Plural:
catalaígh (catalysts)
Genitive singular:
catalaígh, an chatalaígh (e.g. éifeacht an chatalaígh, the effect of the catalyst)
Genitive plural:
catalaíoch, na gcatalaíoch (e.g. úsáid na gcatalaíoch, the use of the catalysts)

What does “catalaíoch” mean?

catalyst
A substance that speeds up a chemical reaction without itself being used up.Also: catalytic agent, catalysing agent.
Other entries for “catalaíoch”

The same spelling has its own page as:

“Catalaíoch” with the article

The plural of catalyst in Irish is catalaígh. Here is catalaíoch after the article (an t-alt), in the singular and the plural.

an catalaíoch
the catalyst
No change after an
na catalaígh
the catalysts
Plural: no change after na

“Catalaíoch” in a sentence: Irish examples

Common Irish sentences using catalaíoch, the Irish word for catalyst.

Is catalaíoch é an platanam.
Platinum is a catalyst.
Cuireann an catalaíoch dlús leis an imoibriú.
The catalyst speeds up the reaction.
Ní athraítear an catalaíoch san imoibriú.
The catalyst is not changed in the reaction.
Rinneamar staidéar ar ról an chatalaígh.
We studied the role of the catalyst.
Úsáidtear catalaígh go forleathan sa tionscal.
Catalysts are widely used in industry.
Tá cumhacht na gcatalaíoch an-tábhachtach.
The power of catalysts is very important.
Gan catalaíoch, bheadh an t-imoibriú an-mhall.
Without a catalyst, the reaction would be very slow.

Other nouns in Irish

More everyday Irish nouns to learn next.

Catalyst in Irish: frequently asked questions

What is the Irish for catalyst?

The Irish for catalyst is catalaíoch (pronounced “KAT-uh-lee-ukh”). It’s a masculine noun and the plural is catalaígh.

How do you pronounce catalaíoch in Irish?

Catalaíoch is said like “KAT-uh-lee-ukh” (IPA /ˈkat̪ˠəlˠiːəx/).

What is the plural of catalyst in Irish?

The plural of catalaíoch is catalaígh; with the article, na catalaígh means “the catalysts”. The genitive plural is catalaíoch, as in úsáid na gcatalaíoch (the use of the catalysts).

Does catalaíoch have more than one meaning?

Catalaíoch also has its own entry as an adjective meaning catalytic.

Why does catalaíoch change to chatalaíoch or gcatalaíoch?

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

Can 'catalaíoch' be used figuratively, like English 'catalyst'?

It is mainly a chemistry term; for a person or event that triggers change, Irish often prefers phrasing such as 'ba é sin ba chúis leis'.

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