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Antibiotic in Irish (Frithbheathach): Meaning, Pronunciation, Usage

The Irish for antibiotic is frithbheathach, a masculine noun (plural frithbheathaigh).
Updated October 2026Report a mistake

How to say “antibiotic” in Irish

Irish:
frithbheathach
English:
antibiotic
Word type:
noun
Gender:
masculine
Pronunciation:
“FRIH-vya-hukh”  /ˈfʲɾʲɪˌvʲahəx/
Various forms
Plural:
frithbheathaigh (antibiotics)
Genitive singular:
frithbheathaigh, an fhrithbheathaigh (e.g. cúrsa an fhrithbheathaigh, the course of the antibiotic)
Genitive plural:
frithbheathach, na bhfrithbheathach (e.g. úsáid na bhfrithbheathach, the use of the antibiotics)

What does “frithbheathach” mean?

antibiotic
A medicine that kills or stops the growth of bacteria and is used to treat infections.Also: antibiotics, antibacterial drug.

“Frithbheathach” with the article

The plural of antibiotic in Irish is frithbheathaigh. Here is frithbheathach after the article (an t-alt), in the singular and the plural.

an frithbheathach
the antibiotic
No change after an
na frithbheathaigh
the antibiotics
Plural: no change after na

“Frithbheathach” in a sentence: Irish examples

Common Irish sentences using frithbheathach, the Irish word for antibiotic.

Thug an dochtúir frithbheathach dom.
The doctor gave me an antibiotic.
Tá mé ar fhrithbheathaigh le seachtain.
I've been on antibiotics for a week.
Ní oibríonn frithbheathaigh in aghaidh víreas.
Antibiotics don't work against viruses.
Caithfidh tú an frithbheathach a chríochnú.
You have to finish the antibiotic.
Bhí taobhéifeachtaí ag an bhfrithbheathach sin.
That antibiotic had side effects.
Tá imní ann faoi ró-úsáid frithbheathach.
There is concern about the overuse of antibiotics.
Ghlac mé dáileog den fhrithbheathach ar maidin.
I took a dose of the antibiotic this morning.

Other nouns in Irish

More everyday Irish nouns to learn next.

Antibiotic in Irish: frequently asked questions

What is the Irish for antibiotic?

The Irish for antibiotic is frithbheathach (pronounced “FRIH-vya-hukh”). It’s a masculine noun and the plural is frithbheathaigh.

How do you pronounce frithbheathach in Irish?

Frithbheathach is said like “FRIH-vya-hukh” (IPA /ˈfʲɾʲɪˌvʲahəx/).

What is the plural of antibiotic in Irish?

The plural of frithbheathach is frithbheathaigh; with the article, na frithbheathaigh means “the antibiotics”. The genitive plural is frithbheathach, as in úsáid na bhfrithbheathach (the use of the antibiotics).

Why does frithbheathach change to fhrithbheathach or bhfrithbheathach?

Irish changes the start of some words after certain words. After mo (my) frithbheathach becomes mo fhrithbheathach (lenition), and after ár (our) or i (in) it becomes ár bhfrithbheathach (eclipsis).

How do I say 'I am on antibiotics' in Irish?

You can say 'Tá mé ar fhrithbheathaigh', using ar with lenition, just as with other medicines.

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