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Reaction in Irish (Frithghníomh): Meaning, Pronunciation, Usage

The Irish for reaction is frithghníomh, a masculine noun (plural frithghníomhartha).
Updated October 2026Report a mistake

How to say “reaction” in Irish

Irish:
frithghníomh
English:
reaction
Word type:
noun
Gender:
masculine, first declension
Pronunciation:
“FRIH-yneev”  /ˈfʲɾʲɪˌɣɲiːw/
Various forms
Plural:
frithghníomhartha (reactions)
Genitive singular:
frithghnímh, an fhrithghnímh (e.g. neart an fhrithghnímh, the strength of the reaction)
Genitive plural:
frithghníomhartha, na bhfrithghníomhartha (e.g. sraith na bhfrithghníomhartha, the series of reactions)

What does “frithghníomh” mean?

reaction
An action done in response to something, or a physical or chemical response.Also: counteraction, response.

“Frithghníomh” with the article

The plural of reaction in Irish is frithghníomhartha. Here is frithghníomh after the article (an t-alt), in the singular and the plural.

an frithghníomh
the reaction
No change after an
na frithghníomhartha
the reactions
Plural: no change after na

“Frithghníomh” in a sentence: Irish examples

Common Irish sentences using frithghníomh, the Irish word for reaction.

Bhí frithghníomh láidir ag an bpobal ar an scéal.
The public reacted strongly to the story.
Ní raibh súil agam leis an bhfrithghníomh sin.
I didn't expect that reaction.
Tá gach gníomh agus a fhrithghníomh féin aige.
Every action has its own reaction.
Rinneamar staidéar ar fhrithghníomhartha ceimiceacha inniu.
We studied chemical reactions today.
Bhí iontas orm faoi mo fhrithghníomh féin.
I was surprised by my own reaction.
Tharla athrú mór i rith an fhrithghnímh.
A big change happened during the reaction.
Cuireadh na frithghníomhartha éagsúla i gcomparáid le chéile.
The various reactions were compared.

Other nouns in Irish

More everyday Irish nouns to learn next.

Reaction in Irish: frequently asked questions

What is the Irish for reaction?

The Irish for reaction is frithghníomh (pronounced “FRIH-yneev”). It’s a masculine noun and the plural is frithghníomhartha.

How do you pronounce frithghníomh in Irish?

Frithghníomh is said like “FRIH-yneev” (IPA /ˈfʲɾʲɪˌɣɲiːw/).

What is the plural of reaction in Irish?

The plural of frithghníomh is frithghníomhartha; with the article, na frithghníomhartha means “the reactions”. The genitive plural is frithghníomhartha, as in sraith na bhfrithghníomhartha (the series of reactions).

Why does frithghníomh change to fhrithghníomh or bhfrithghníomh?

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

Is 'frithghníomh' the word for a chemical reaction?

It is used, but in chemistry 'imoibriú' is also a common standard term for reaction; 'frithghníomh' is the general word for a reaction or response.

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