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Set theory in Irish (Tacartheoiric): Meaning, Pronunciation, Usage

The Irish for set theory is tacartheoiric, a feminine noun (plural tacartheoiricí).
Updated October 2026Report a mistake

How to say “set theory” in Irish

Irish:
tacartheoiric
English:
set theory
Word type:
noun
Gender:
feminine, second declension
Pronunciation:
“TAK-ur-hyoh-rik”  /ˈt̪ˠakəɾˌhoːɾʲəcː/
Various forms
Plural:
tacartheoiricí (set theories)
Genitive singular:
tacartheoirice, na tacartheoirice (e.g. bunphrionsabail na tacartheoirice, the basic principles of set theory)
Genitive plural:
tacartheoiricí, na dtacartheoiricí (e.g. comparáid idir tacartheoiricí éagsúla, a comparison between different set theories)

What does “tacartheoiric” mean?

set theory
The branch of mathematics that studies sets, that is, collections of objects, and the relations between them.Also: theory of sets, sets.

“Tacartheoiric” with the article

The plural of set theory in Irish is tacartheoiricí. Here is tacartheoiric after the article (an t-alt), in the singular and the plural.

an tacartheoiric
the set theory
No change: d and t are not lenited after an
na tacartheoiricí
the set theories
Plural: no change after na

“Tacartheoiric” in a sentence: Irish examples

Common Irish sentences using tacartheoiric, the Irish word for set theory.

Is brainse den mhatamaitic í an tacartheoiric.
Set theory is a branch of mathematics.
Táimid ag foghlaim tacartheoirice ar scoil anois.
We are learning set theory at school now.
Bhí ceist faoin tacartheoiric sa scrúdú inné.
There was a question on set theory in the exam yesterday.
Thaitin coincheapa na tacartheoirice go mór liom.
I really liked the concepts of set theory.
Úsáidtear léaráidí Venn i dtacartheoiric go minic.
Venn diagrams are often used in set theory.
Tá mo léachtóir ina saineolaí ar thacartheoiric.
My lecturer is an expert in set theory.
Tá tacartheoiricí éagsúla ann i measc matamaiticeoirí.
There are various set theories among mathematicians.

Other nouns in Irish

More everyday Irish nouns to learn next.

Set theory in Irish: frequently asked questions

What is the Irish for set theory?

The Irish for set theory is tacartheoiric (pronounced “TAK-ur-hyoh-rik”). It’s a feminine noun and the plural is tacartheoiricí.

How do you pronounce tacartheoiric in Irish?

Tacartheoiric is said like “TAK-ur-hyoh-rik” (IPA /ˈt̪ˠakəɾˌhoːɾʲəcː/).

What is the plural of set theory in Irish?

The plural of tacartheoiric is tacartheoiricí; with the article, na tacartheoiricí means “the set theories”. The genitive plural is tacartheoiricí, as in comparáid idir tacartheoiricí éagsúla (a comparison between different set theories).

Why does tacartheoiric change to thacartheoiric or dtacartheoiric?

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

What is the word for a 'set' in maths?

A mathematical set is 'tacar', so 'tacartheoiric' is literally 'set theory', from 'tacar' plus 'teoiric'.

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