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Congratulation in Irish (Tréaslú): Meaning, Pronunciation, Usage

The Irish for congratulation is tréaslú, a masculine noun (plural tréasluithe). Ag tréaslú is congratulating, from the verb tréaslaigh.
Updated October 2026Report a mistake

How to say “congratulation” in Irish

Irish:
tréaslú
English:
congratulation
Word type:
noun (verbal noun)
Verbal noun of:
tréaslaigh, to congratulate (ag tréaslú, congratulating)
Gender:
masculine, fourth declension
Pronunciation:
“TRAYS-loo”  /tʲɾʲeːsˠl̪ˠuː/
Various forms
Plural:
tréasluithe (congratulations)
Genitive singular:
tréaslaithe, an tréaslaithe (e.g. cárta tréaslaithe, congratulations card)
Genitive plural:
tréasluithe, na dtréasluithe (e.g. teachtaireachtaí na dtréasluithe, the messages of congratulation)

What does “tréaslú” mean?

congratulation
The act of congratulating someone; it is the verbal noun of the verb 'tréaslaigh' (congratulate).Also: congratulating, felicitation, compliment.

Other Irish words for congratulation: comhghairdeas (congratulations)

“Tréaslú” as a verbal noun

After ag, tréaslú means congratulating: it is the verbal noun of the verb tréaslaigh (to congratulate). A noun that follows it goes into the genitive.

agat
+
tréaslúverbal noun
=
ag tréaslúcongratulating

“Tréaslú” with the article

The plural of congratulation in Irish is tréasluithe. Here is tréaslú after the article (an t-alt), in the singular and the plural.

an tréaslú
the congratulation
No change after an
na tréasluithe
the congratulations
Plural: no change after na

“Tréaslú” in a sentence: Irish examples

Common Irish sentences using tréaslú, the Irish word for congratulation.

Tá tréaslú tuillte aici as an obair sin.
She deserves congratulations for that work.
Chuir sé teachtaireacht tréaslaithe chugam.
He sent me a message of congratulations.
Fuair siad an-chuid tréasluithe ar a bpósadh.
They received lots of congratulations on their wedding.
Ghlac sí leis an tréaslú go humhal.
She accepted the congratulations modestly.
Seo mo thréaslú ó chroí leat.
Here are my heartfelt congratulations to you.
Cheannaigh mé cárta tréaslaithe di inné.
I bought her a congratulations card yesterday.
Bhí tréaslú i ngach litir a tháinig.
Every letter that came contained congratulations.

Other nouns in Irish

More everyday Irish nouns to learn next.

Congratulation in Irish: frequently asked questions

What is the Irish for congratulation?

The Irish for congratulation is tréaslú (pronounced “TRAYS-loo”). It’s a masculine noun and the plural is tréasluithe.

How do you pronounce tréaslú in Irish?

Tréaslú is said like “TRAYS-loo” (IPA /tʲɾʲeːsˠl̪ˠuː/).

What is the plural of congratulation in Irish?

The plural of tréaslú is tréasluithe; with the article, na tréasluithe means “the congratulations”. The genitive plural is tréasluithe, as in teachtaireachtaí na dtréasluithe (the messages of congratulation).

Why does tréaslú change to thréaslú or dtréaslú?

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

How do I normally say 'congratulations' in Irish?

The everyday expression is 'Comhghairdeas!' or 'Comhghairdeas leat!'; 'tréaslú' is the more formal verbal noun, as in 'tréaslaím leat' (I congratulate you).

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