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Infectious in Irish (ionfhabhtaíoch): Meaning, Forms, Examples

The Irish for infectious is ionfhabhtaíoch: galar ionfhabhtaíoch, an infectious disease.
Updated October 2026Report a mistake

How to say “infectious” in Irish

Irish:
ionfhabhtaíoch
English:
infectious
Word type:
adjective
More infectious:
níos ionfhabhtaíche
Most infectious:
is ionfhabhtaíche
Plural:
ionfhabhtaíocha
Pronunciation:
“UN-ow-tee-ukh”  /ˈʊnˠəuːt̪ˠiːəx/

What does “ionfhabhtaíoch” mean?

infectious
Describes a disease or germ that can spread from one person or animal to another.Also: contagious, catching, infective.

Other Irish adjectives for infectious: tógálach (infectious)

“Ionfhabhtaíoch” after a noun

An Irish adjective comes after its noun. Here is ionfhabhtaíoch after galar (disease, masculine), after aicíd (disease, feminine) and after a plural.

after a masculine noungalar ionfhabhtaíochan infectious disease
after a feminine nounaicíd ionfhabhtaíochan infectious disease
after a plural noungalair ionfhabhtaíochainfectious diseases

séimhiú (the h) the ending

plural
galairdiseases
+
ionfhabhtaíochainfectious, plural
=
galair ionfhabhtaíochainfectious diseases

With a plural noun the adjective takes its plural form, ionfhabhtaíocha.

More infectious, most infectious, very infectious

níosmore
+
ionfhabhtaícheinfectious
=
níos ionfhabhtaíchemore infectious
ismost
+
ionfhabhtaícheinfectious
=
is ionfhabhtaíchemost infectious

Tá an víreas nua níos ionfhabhtaíche ná an seancheann. The new virus is more infectious than the old one.

more infectiousníos ionfhabhtaíchein the past tense: ní b'ionfhabhtaíche
most infectiousis ionfhabhtaíchein the past tense: ab ionfhabhtaíche
as infectious aschomh hionfhabhtaíoch lechomh puts an h before a vowel
very infectiousan-ionfhabhtaíochan- lenites, except d, t and s
too infectiousró-ionfhabhtaíochró- lenites

“Ionfhabhtaíoch” in a sentence: Irish examples

With a masculine noun, a feminine noun, a plural, a comparison and on its own.

Is galar ionfhabhtaíoch í an bhruitíneach.
Measles is an infectious disease.
Tá aicíd ionfhabhtaíoch ag scaipeadh sa bhaile.
An infectious disease is spreading in the town.
Bíonn galair ionfhabhtaíocha coitianta sa gheimhreadh.
Infectious diseases are common in winter.
Tá an víreas nua níos ionfhabhtaíche ná an seancheann.
The new virus is more infectious than the old one.
Tá an fliú an-ionfhabhtaíoch.
The flu is very infectious.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Infectious in Irish: frequently asked questions

What is the Irish for infectious?

The Irish for infectious is ionfhabhtaíoch (pronounced “UN-ow-tee-ukh”). It comes after the noun: galar ionfhabhtaíoch, an infectious disease; aicíd ionfhabhtaíoch, an infectious disease.

How do you say more infectious and most infectious in Irish?

níos ionfhabhtaíche is more infectious and is ionfhabhtaíche is most infectious. In the past tense they become ní b'ionfhabhtaíche and ab ionfhabhtaíche.

What is the plural of ionfhabhtaíoch?

With a plural noun ionfhabhtaíoch becomes ionfhabhtaíocha: galair ionfhabhtaíocha, aicídí ionfhabhtaíocha.

How do you say very infectious in Irish?

an-ionfhabhtaíoch. Too infectious is ró-ionfhabhtaíoch, and as infectious as is chomh hionfhabhtaíoch le.

What is the difference between 'ionfhabhtaíoch' and 'tógálach'?

'Ionfhabhtaíoch' is the technical word for infectious, linked to 'ionfhabhtú' (infection), while 'tógálach' is the everyday word for catching or contagious.

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