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Theoretical in Irish (teoiriciúil): Meaning, Forms, Examples

The Irish for theoretical is teoiriciúil: fear teoiriciúil, a theoretical man.
Updated October 2026Report a mistake

How to say “theoretical” in Irish

Irish:
teoiriciúil
English:
theoretical
Word type:
adjective
More theoretical:
níos teoiriciúla
Most theoretical:
is teoiriciúla
Plural:
teoiriciúla
Pronunciation:
“TYOR-ik-ool”  /tʲoːɾʲɪcuːlʲ/

What does “teoiriciúil” mean?

theoretical
Based on theory or ideas rather than on practice or experience.Also: theoretic, abstract, hypothetical.

“Teoiriciúil” after a noun

An Irish adjective comes after its noun. Here is teoiriciúil after fear (man, masculine), after scéim (scheme, feminine) and after a plural.

after a masculine nounfear teoiriciúila theoretical man
after a feminine nounscéim theoiriciúila theoretical scheme
after a plural nounfir theoiriciúlatheoretical men

séimhiú (the h) the ending

feminine
scéimscheme
+
teoiriciúiltheoretical
=
scéim theoiriciúila theoretical scheme

After a feminine noun the adjective gets a séimhiú, an h after its first letter: scéim theoiriciúil. After a masculine noun it stays as it is: fear teoiriciúil.

plural
firmen
+
teoiriciúlatheoretical, plural
=
fir theoiriciúlatheoretical men

With a plural noun the adjective takes its plural form, teoiriciúla. It also gets an h after a plural that ends in a slender consonant: fir theoiriciúla; after other plurals it does not: scéimeanna teoiriciúla.

More theoretical, most theoretical, very theoretical

níosmore
+
teoiriciúlatheoretical
=
níos teoiriciúlamore theoretical
ismost
+
teoiriciúlatheoretical
=
is teoiriciúlamost theoretical

Tá an cúrsa seo níos teoiriciúla ná an ceann eile. This course is more theoretical than the other one.

more theoreticalníos teoiriciúlain the past tense: ní ba theoiriciúla
most theoreticalis teoiriciúlain the past tense: ba theoiriciúla
as theoretical aschomh teoiriciúil leno change after chomh
very theoreticalan-teoiriciúilan- lenites, except d, t and s
too theoreticalrótheoiriciúilró- lenites

“Teoiriciúil” in a sentence: Irish examples

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

Tá eolas teoiriciúil maith aige ar an ábhar.
He has good theoretical knowledge of the subject.
Rinne sí staidéar ar an bhfisic theoiriciúil.
She studied theoretical physics.
Phléamar ceisteanna teoiriciúla sa rang inniu.
We discussed theoretical questions in class today.
Tá an cúrsa seo níos teoiriciúla ná an ceann eile.
This course is more theoretical than the other one.
Tá an fhadhb sin teoiriciúil go fóill.
That problem is still theoretical.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Theoretical in Irish: frequently asked questions

What is the Irish for theoretical?

The Irish for theoretical is teoiriciúil (pronounced “TYOR-ik-ool”). It comes after the noun: fear teoiriciúil, a theoretical man; scéim theoiriciúil, a theoretical scheme.

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

níos teoiriciúla is more theoretical and is teoiriciúla is most theoretical. In the past tense they become ní ba theoiriciúla and ba theoiriciúla.

Why does teoiriciúil become theoiriciúil?

After a feminine singular noun an adjective is lenited: it gets an h after its first letter. So scéim theoiriciúil (a theoretical scheme) but fear teoiriciúil (a theoretical man), because fear is masculine.

What is the plural of teoiriciúil?

With a plural noun teoiriciúil becomes teoiriciúla: fir theoiriciúla, scéimeanna teoiriciúla. After a plural that ends in a slender consonant it is lenited as well.

How do you say very theoretical in Irish?

an-teoiriciúil. Too theoretical is rótheoiriciúil, and as theoretical as is chomh teoiriciúil le.

What is the opposite of teoiriciúil?

The usual opposite is praiticiúil, practical, as in obair phraiticiúil, practical work.

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