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Catalysing in Irish (Catalú): Meaning, Pronunciation, Usage

The Irish for catalysing is catalú, a masculine noun. Ag catalú is catalysing, from the verb catalaigh.
Updated October 2026Report a mistake

How to say “catalysing” in Irish

Irish:
catalú
English:
catalysing
Word type:
noun (verbal noun)
Verbal noun of:
catalaigh, to catalyse (ag catalú, catalysing)
Gender:
masculine
Pronunciation:
“KAT-uh-loo”  /ˈkat̪ˠəl̪ˠuː/
Various forms
Genitive singular:
catalaithe, an chatalaithe (e.g. obair chatalaithe, catalysing work)

What does “catalú” mean?

catalysing
The act of catalysing a chemical reaction; the verbal noun of the verb catalaigh.Also: catalysis.

“Catalú” as a verbal noun

After ag, catalú means catalysing: it is the verbal noun of the verb catalaigh (to catalyse). A noun that follows it goes into the genitive.

agat
+
catalúverbal noun
=
ag catalúcatalysing

“Catalú” with the article

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

an catalú
the catalysing
No change after an

“Catalú” in a sentence: Irish examples

Common Irish sentences using catalú, the Irish word for catalysing.

Tá catalú na leabhar beagnach críochnaithe.
The cataloguing of the books is nearly finished.
Thosaigh an leabharlann ar chatalú na lámhscríbhinní.
The library began cataloguing the manuscripts.
Is obair mhall é an catalú.
Cataloguing is slow work.
Tá sí ag catalú na gcáipéisí sa chartlann.
She is cataloguing the documents in the archive.
Fuair sé post mar chúntóir catalaithe.
He got a job as a cataloguing assistant.
Bhí costas an chatalaithe níos airde ná mar a ceapadh.
The cost of the cataloguing was higher than expected.
Úsáideann siad córas nua don chatalú anois.
They now use a new system for cataloguing.

Other nouns in Irish

More everyday Irish nouns to learn next.

Catalysing in Irish: frequently asked questions

What is the Irish for catalysing?

The Irish for catalysing is catalú (pronounced “KAT-uh-loo”). It’s a masculine noun.

How do you pronounce catalú in Irish?

Catalú is said like “KAT-uh-loo” (IPA /ˈkat̪ˠəl̪ˠuː/).

Does catalú have a plural?

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

Why does catalú change to chatalú or gcatalú?

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

What is the difference between catalú and catalóg?

Catalóg is the catalogue itself, while catalú is the act of cataloguing, the verbal noun of catalaigh.

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