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Antiparticle in Irish (Frithcháithnín): Meaning, Pronunciation, Usage

The Irish for antiparticle is frithcháithnín, a masculine noun (plural frithcháithníní).
Updated October 2026Report a mistake

How to say “antiparticle” in Irish

Irish:
frithcháithnín
English:
antiparticle
Word type:
noun
Gender:
masculine, fourth declension
Pronunciation:
“FRIH-khaw-neen”  /ˈfʲɾʲɪxaːnʲiːnʲ/
Various forms
Plural:
frithcháithníní (antiparticles)
Genitive singular:
frithcháithnín, an fhrithcháithnín (e.g. mais an fhrithcháithnín, the mass of the antiparticle)
Genitive plural:
frithcháithníní, na bhfrithcháithníní (e.g. airíonna na bhfrithcháithníní, the properties of antiparticles)

What does “frithcháithnín” mean?

antiparticle
In physics, a particle with the same mass as an ordinary particle but opposite charge and other properties.Also: anti-particle, antimatter particle.

“Frithcháithnín” with the article

The plural of antiparticle in Irish is frithcháithníní. Here is frithcháithnín after the article (an t-alt), in the singular and the plural.

an frithcháithnín
the antiparticle
No change after an
na frithcháithníní
the antiparticles
Plural: no change after na

“Frithcháithnín” in a sentence: Irish examples

Common Irish sentences using frithcháithnín, the Irish word for antiparticle.

Is frithcháithnín é an posatrón.
The positron is an antiparticle.
Tá a fhrithcháithnín féin ag gach cáithnín.
Every particle has its own antiparticle.
Bíonn lucht leictreach dearfach ar an bhfrithcháithnín seo.
This antiparticle has a positive electric charge.
Scriosann cáithnín agus frithcháithnín a chéile nuair a bhuaileann siad.
A particle and an antiparticle destroy each other when they collide.
Déantar frithábhar as frithcháithníní.
Antimatter is made of antiparticles.
Rinne na heolaithe frithcháithníní i luasaire.
The scientists produced antiparticles in an accelerator.
Thomhais siad fuinneamh an fhrithcháithnín go cruinn.
They measured the energy of the antiparticle precisely.

Other nouns in Irish

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Antiparticle in Irish: frequently asked questions

What is the Irish for antiparticle?

The Irish for antiparticle is frithcháithnín (pronounced “FRIH-khaw-neen”). It’s a masculine noun and the plural is frithcháithníní.

How do you pronounce frithcháithnín in Irish?

Frithcháithnín is said like “FRIH-khaw-neen” (IPA /ˈfʲɾʲɪxaːnʲiːnʲ/).

What is the plural of antiparticle in Irish?

The plural of frithcháithnín is frithcháithníní; with the article, na frithcháithníní means “the antiparticles”. The genitive plural is frithcháithníní, as in airíonna na bhfrithcháithníní (the properties of antiparticles).

Why does frithcháithnín change to fhrithcháithnín or bhfrithcháithnín?

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

How is 'frithcháithnín' formed?

It is the prefix 'frith-' (anti-, counter-) plus 'cáithnín' (particle), with lenition of the c after the prefix, giving 'frithcháithnín'.

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