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Fever in Irish (Fiabhras): Meaning, Pronunciation, Usage

‘fiabhras’ also means: fever (disease)

The Irish for fever is fiabhras, a masculine noun (plural fiabhrais).
Updated October 2026Report a mistake

How to say “fever” in Irish

Irish:
fiabhras
English:
fever, fever (disease)
Word type:
noun
Gender:
masculine, first declension
Pronunciation:
“FEE-uh-vruss”  /ˈfʲiəvˠɾˠəsˠ/
Various forms
Plural:
fiabhrais (fevers)
Genitive singular:
fiabhrais, an fhiabhrais (e.g. comharthaí an fhiabhrais, the symptoms of the fever)
Genitive plural:
fiabhras, na bhfiabhras (e.g. cóireáil na bhfiabhras, the treatment of the fevers)

What does “fiabhras” mean?

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

fever
A raised body temperature, usually a sign of illness or infection.Also: temperature, high temperature.
1 other meaning: fever (disease)
2fever (disease)
Any of various illnesses marked by fever, such as typhoid or scarlet fever, often named with a qualifier.Also: fever, febrile disease, infectious fever.

“Fiabhras” with the article

The plural of fever in Irish is fiabhrais. Here is fiabhras after the article (an t-alt), in the singular and the plural.

an fiabhras
the fever
No change after an
na fiabhrais
the fevers
Plural: no change after na

“Fiabhras” in a sentence: Irish examples

Common Irish sentences using fiabhras, the Irish word for fever.

Tá fiabhras ar an bpáiste ó aréir.
The child has had a fever since last night.
Thit an fiabhras ar maidin, buíochas le Dia.
The fever went down this morning, thank God.
Bhí sí trí lá sa leaba leis an bhfiabhras.
She was three days in bed with the fever.
Is comhartha fiabhrais é an t-allas sin.
That sweating is a sign of fever.
Bhí mo mhac i bhfiabhras ar feadh na hoíche.
My son was feverish all night.
Bhí fiabhras ar leath an ranga an tseachtain seo.
Half the class had a fever this week.
Tabhair an leigheas seo dó má thagann fiabhras air.
Give him this medicine if he gets a fever.

Other nouns in Irish

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Fever in Irish: frequently asked questions

What is the Irish for fever?

The Irish for fever is fiabhras (pronounced “FEE-uh-vruss”). It’s a masculine noun and the plural is fiabhrais. Depending on context it can also mean fever (disease).

How do you pronounce fiabhras in Irish?

Fiabhras is said like “FEE-uh-vruss” (IPA /ˈfʲiəvˠɾˠəsˠ/).

What is the plural of fever in Irish?

The plural of fiabhras is fiabhrais; with the article, na fiabhrais means “the fevers”. The genitive plural is fiabhras, as in cóireáil na bhfiabhras (the treatment of the fevers).

Does fiabhras have more than one meaning?

Yes. Fiabhras can mean fever or fever (disease), depending on context; the first is the most common.

Why does fiabhras change to fhiabhras or bhfiabhras?

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

How do I say someone has a fever?

Use 'ar': Tá fiabhras air means 'he has a fever'. Literally, the fever is on him.

Is 'fiabhras' the same as 'teocht'?

Teocht means temperature in general, while fiabhras is the illness or raised temperature itself; you can also say Tá teocht ard aici for 'she has a high temperature'.

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