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

‘imoibriú’ also means: reacting

The Irish for reaction is imoibriú, a masculine noun (plural imoibrithe). Ag imoibriú is reacting, from the verb imoibrigh.
Updated October 2026Report a mistake

How to say “reaction” in Irish

Irish:
imoibriú
English:
reaction, reacting
Word type:
noun (verbal noun)
Verbal noun of:
imoibrigh, to react (ag imoibriú, reacting)
Gender:
masculine
Pronunciation:
“IM-ib-roo”  /ˈɪmˌɛbʲɾʲuː/
Various forms
Plural:
imoibrithe (reactions)
Genitive singular:
imoibrithe, an imoibrithe (e.g. luas an imoibrithe, the rate of the reaction)
Genitive plural:
imoibrithe, na n-imoibrithe (e.g. rátaí na n-imoibrithe, the rates of the reactions)

What does “imoibriú” mean?

“Imoibriú” has two alternative meanings. The most common comes first.

reaction
A chemical or physical reaction, a process in which substances act on each other and change; it is the verbal noun of the verb imoibrigh.Also: chemical reaction, reacting.
1 other meaning: reacting
2reacting
The act of reacting or responding to something; verbal noun of imoibrigh.Also: reaction, response.

“Imoibriú” as a verbal noun

After ag, imoibriú means reacting: it is the verbal noun of the verb imoibrigh (to react). A noun that follows it goes into the genitive.

agat
+
imoibriúverbal noun
=
ag imoibriúreacting

“Imoibriú” with the article

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

an t-imoibriú
the reaction
Masculine nouns take t before a vowel after an
na himoibrithe
the reactions
Plural: na adds h before a vowel

“Imoibriú” in a sentence: Irish examples

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

Is imoibriú ceimiceach é an dó.
Burning is a chemical reaction.
Tharla an t-imoibriú go han-tapa.
The reaction happened very quickly.
Thomhaiseamar luas an imoibrithe sa tsaotharlann.
We measured the rate of the reaction in the lab.
Tá a lán imoibrithe éagsúla sa cheimic.
There are many different reactions in chemistry.
Scríobh an múinteoir an t-imoibriú ar an gclár.
The teacher wrote the reaction on the board.
Scaoileann an t-imoibriú seo teas.
This reaction releases heat.
Bhí teas le brath san imoibriú.
Heat could be felt in the reaction.

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 imoibriú (pronounced “IM-ib-roo”). It’s a masculine noun and the plural is imoibrithe. Depending on context it can also mean reacting.

How do you pronounce imoibriú in Irish?

Imoibriú is said like “IM-ib-roo” (IPA /ˈɪmˌɛbʲɾʲuː/).

What is the plural of reaction in Irish?

The plural of imoibriú is imoibrithe; with the article, na himoibrithe means “the reactions”. The genitive plural is imoibrithe, as in rátaí na n-imoibrithe (the rates of the reactions).

Does imoibriú have more than one meaning?

Yes. Imoibriú can mean reaction or reacting, depending on context; the first is the most common.

Why does imoibriú sometimes have a t or h in front of it?

Irish nouns beginning with a vowel take a prefix after certain words: an t-imoibriú (the reaction), a himoibriú (her reaction), a n-imoibriú (their reaction), na himoibrithe (the reactions).

Is imoibriú used for a person's emotional reaction?

Mostly imoibriú is a scientific term; for a person's reaction or response Irish usually says freagairt or frithghníomh.

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