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Muscle in Irish (Féitheog): Meaning, Pronunciation, Usage

The Irish for muscle is féitheog, a feminine noun (plural féitheoga).
Updated October 2026Report a mistake

How to say “muscle” in Irish

Irish:
féitheog
English:
muscle
Word type:
noun
Gender:
feminine, second declension
Pronunciation:
“FAY-hyohg”  /ˈfʲeːhoːɡ/
Various forms
Plural:
féitheoga (muscles)
Genitive singular:
féitheoige, na féitheoige (e.g. pian na féitheoige, the pain in the muscle)
Genitive plural:
féitheog, na bhféitheog (e.g. neart na bhféitheog, the strength of the muscles)

What does “féitheog” mean?

muscle
A band of tissue in the body that contracts to produce movement.Also: sinew, brawn.

Other Irish words for muscle: matán (muscle)

“Féitheog” with the article

The plural of muscle in Irish is féitheoga. Here is féitheog after the article (an t-alt), in the singular and the plural.

an fhéitheog
the muscle
Lenition: f becomes fh after an (feminine noun)
na féitheoga
the muscles
Plural: no change after na

“Féitheog” in a sentence: Irish examples

Common Irish sentences using féitheog, the Irish word for muscle.

Tharraing mé féitheog i mo chos inné.
I pulled a muscle in my leg yesterday.
Tá an fhéitheog sin an-tinn anois.
That muscle is very sore now.
Tá féitheoga láidre ag an imreoir sin.
That player has strong muscles.
Bhí crapadh féitheoige air le linn an chluiche.
He had a muscle cramp during the game.
Cabhraíonn síneadh le do chuid féitheog.
Stretching helps your muscles.
Gortaíodh féitheog i mo dhroim nuair a thit mé.
I hurt a muscle in my back when I fell.
Is féitheog é an croí.
The heart is a muscle.

Other nouns in Irish

More everyday Irish nouns to learn next.

Muscle in Irish: frequently asked questions

What is the Irish for muscle?

The Irish for muscle is féitheog (pronounced “FAY-hyohg”). It’s a feminine noun and the plural is féitheoga.

How do you pronounce féitheog in Irish?

Féitheog is said like “FAY-hyohg” (IPA /ˈfʲeːhoːɡ/).

What is the plural of muscle in Irish?

The plural of féitheog is féitheoga; with the article, na féitheoga means “the muscles”. The genitive plural is féitheog, as in neart na bhféitheog (the strength of the muscles).

Why does féitheog change to fhéitheog or bhféitheog?

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

What is the difference between féitheog and matán?

Both can mean muscle; féitheog is the usual anatomical term, while matán is also common, especially in Munster and for a bulging muscle.

Is féitheog related to féith?

Yes, féitheog is derived from féith, which means a vein or sinew.

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