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Formula in Irish (Foirmle): Meaning, Pronunciation, Usage

The Irish for formula is foirmle, a feminine noun (plural foirmlí).
Updated October 2026Report a mistake

How to say “formula” in Irish

Irish:
foirmle
English:
formula
Word type:
noun
Gender:
feminine, fourth declension
Pronunciation:
“FER-im-luh”  /ˈfˠɛɾʲəmʲlʲə/
Various forms
Plural:
foirmlí (formulas)
Genitive singular:
foirmle, na foirmle (e.g. brí na foirmle, the meaning of the formula)
Genitive plural:
foirmlí, na bhfoirmlí (e.g. úsáid na bhfoirmlí, the use of the formulas)

What does “foirmle” mean?

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

formula
A rule or fact written with symbols, especially in mathematics or chemistry.Also: equation, chemical formula, mathematical formula.
1 other meaning:
2formula
A fixed form of words or a set method used for doing something.Also: set form, fixed wording, method.

“Foirmle” with the article

The plural of formula in Irish is foirmlí. Here is foirmle after the article (an t-alt), in the singular and the plural.

an fhoirmle
the formula
Lenition: f becomes fh after an (feminine noun)
na foirmlí
the formulas
Plural: no change after na

“Foirmle” in a sentence: Irish examples

Common Irish sentences using foirmle, the Irish word for formula.

Scríobh an fhoirmle ar an gclár bán.
Write the formula on the whiteboard.
Is é H2O foirmle an uisce.
H2O is the formula for water.
Ní cuimhin liom an fhoirmle in aon chor.
I can't remember the formula at all.
Tá go leor foirmlí le foghlaim don scrúdú.
There are lots of formulas to learn for the exam.
Bhí botún i m'fhoirmle, faraor.
There was a mistake in my formula, unfortunately.
Tá an freagra le fáil san fhoirmle seo.
The answer can be found in this formula.
D'úsáid sí na foirmlí cearta sa tasc.
She used the correct formulas in the task.

Other nouns in Irish

More everyday Irish nouns to learn next.

Formula in Irish: frequently asked questions

What is the Irish for formula?

The Irish for formula is foirmle (pronounced “FER-im-luh”). It’s a feminine noun and the plural is foirmlí.

How do you pronounce foirmle in Irish?

Foirmle is said like “FER-im-luh” (IPA /ˈfˠɛɾʲəmʲlʲə/).

What is the plural of formula in Irish?

The plural of foirmle is foirmlí; with the article, na foirmlí means “the formulas”. The genitive plural is foirmlí, as in úsáid na bhfoirmlí (the use of the formulas).

Why does foirmle change to fhoirmle or bhfoirmle?

Irish changes the start of some words after certain words. After mo (my) foirmle becomes m'fhoirmle (lenition), and after ár (our) or i (in) it becomes ár bhfoirmle (eclipsis).

Is 'foirmle' the word for baby formula?

Not usually: infant formula is generally called 'bainne foirmle' or 'bainne púdair', while 'foirmle' alone means a mathematical or chemical formula.

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