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Catalytic in Irish (catalaíoch): Meaning, Forms, Examples

Other uses of ‘catalaíoch’: catalyst (noun, masculine)

The Irish for catalytic is catalaíoch: tiontaire catalaíoch, a catalytic converter.
Updated October 2026Report a mistake

How to say “catalytic” in Irish

Irish:
catalaíoch
English:
catalytic
Word type:
adjective
More catalytic:
níos catalaíche
Most catalytic:
is catalaíche
Plural:
catalaíocha
Pronunciation:
“KAT-a-lee-okh”  /ˈkat̪ˠəl̪ˠiːəx/

What does “catalaíoch” mean?

catalytic
Describes something that speeds up a chemical reaction, or that causes change to happen.Also: catalysing, acting as a catalyst.
Other entries for “catalaíoch”

The same spelling has its own page as:

“Catalaíoch” after a noun

An Irish adjective comes after its noun. Here is catalaíoch after tiontaire (converter, masculine), after bean (woman, feminine) and after a plural.

after a masculine nountiontaire catalaíocha catalytic converter
after a feminine nounbean chatalaíocha catalytic woman
after a plural nountiontairí catalaíochacatalytic converters

séimhiú (the h) the ending

feminine
beanwoman
+
catalaíochcatalytic
=
bean chatalaíocha catalytic woman

After a feminine noun the adjective gets a séimhiú, an h after its first letter: bean chatalaíoch. After a masculine noun it stays as it is: tiontaire catalaíoch.

plural
tiontairíconverters
+
catalaíochacatalytic, plural
=
tiontairí catalaíochacatalytic converters

With a plural noun the adjective takes its plural form, catalaíocha. It also gets an h after a plural that ends in a slender consonant; after other plurals it does not: mná catalaíocha.

More catalytic, most catalytic, very catalytic

níosmore
+
catalaíchecatalytic
=
níos catalaíchemore catalytic
ismost
+
catalaíchecatalytic
=
is catalaíchemost catalytic

Tá an miotal seo níos catalaíche ná an ceann eile. This metal is more catalytic than the other one.

more catalyticníos catalaíchein the past tense: ní ba chatalaíche
most catalyticis catalaíchein the past tense: ba chatalaíche
as catalytic aschomh catalaíoch leno change after chomh
very catalytican-chatalaíochan- lenites, except d, t and s
too catalyticróchatalaíochró- lenites

“Catalaíoch” in a sentence: Irish examples

With a masculine noun, a feminine noun, a plural, a comparison and on its own.

Tá tiontaire catalaíoch sa charr nua.
The new car has a catalytic converter.
Is imoibriú catalaíoch é sin.
That is a catalytic reaction.
Úsáidtear ábhair chatalaíocha sa tionscal.
Catalytic materials are used in industry.
Tá an miotal seo níos catalaíche ná an ceann eile.
This metal is more catalytic than the other one.
Tá an tsubstaint seo catalaíoch.
This substance is catalytic.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Catalytic in Irish: frequently asked questions

What is the Irish for catalytic?

The Irish for catalytic is catalaíoch (pronounced “KAT-a-lee-okh”). It comes after the noun: tiontaire catalaíoch, a catalytic converter; bean chatalaíoch, a catalytic woman.

How do you say more catalytic and most catalytic in Irish?

níos catalaíche is more catalytic and is catalaíche is most catalytic. In the past tense they become ní ba chatalaíche and ba chatalaíche.

Why does catalaíoch become chatalaíoch?

After a feminine singular noun an adjective is lenited: it gets an h after its first letter. So bean chatalaíoch (a catalytic woman) but tiontaire catalaíoch (a catalytic converter), because tiontaire is masculine.

What is the plural of catalaíoch?

With a plural noun catalaíoch becomes catalaíocha: tiontairí catalaíocha, mná catalaíocha.

How do you say very catalytic in Irish?

an-chatalaíoch. Too catalytic is róchatalaíoch, and as catalytic as is chomh catalaíoch le.

How do you say 'catalytic converter' in Irish?

It is 'tiontaire catalaíoch', the standard term for the device in a car exhaust.

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