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Constant in Irish (tairiseach): Meaning, Forms, Examples

Other uses of ‘tairiseach’: loyal

The Irish for constant is tairiseach: luas tairiseach, a constant speed.
Updated October 2026Report a mistake

How to say “constant” in Irish

Irish:
tairiseach
English:
constant, loyal
Word type:
adjective
More constant:
níos tairisí
Most constant:
is tairisí
Plural:
tairiseacha
Pronunciation:
“TAR-ish-uck”  /ˈtaɾʲəʃəx/

What does “tairiseach” mean?

“Tairiseach” has two alternative meanings. The most common comes first.

constant
Staying the same and not changing over time, especially in a technical or scientific sense.Also: steady, unchanging, invariable.
1 other meaning: loyal
2loyal
Faithful and dependable towards a person or cause.Also: faithful, steadfast, trusty.

“Tairiseach” after a noun

An Irish adjective comes after its noun. Here is tairiseach after luas (speed, masculine), after aimsir (weather, feminine) and after a plural.

after a masculine nounluas tairiseacha constant speed
after a feminine nounaimsir thairiseachconstant weather
after a plural nounluasanna tairiseachaconstant speeds

séimhiú (the h) the ending

feminine
aimsirweather
+
tairiseachconstant
=
aimsir thairiseachconstant weather

After a feminine noun the adjective gets a séimhiú, an h after its first letter: aimsir thairiseach. After a masculine noun it stays as it is: luas tairiseach.

plural
luasannaspeeds
+
tairiseachaconstant, plural
=
luasanna tairiseachaconstant speeds

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

More constant, most constant, very constant

níosmore
+
tairisíconstant
=
níos tairisímore constant
ismost
+
tairisíconstant
=
is tairisímost constant

Tá an teocht níos tairisí anseo ná amuigh. The temperature is more constant here than outside.

more constantníos tairisíin the past tense: ní ba thairisí
most constantis tairisíin the past tense: ba thairisí
as constant aschomh tairiseach leno change after chomh
very constantan-tairiseachan- lenites, except d, t and s
too constantróthairiseachró- lenites

“Tairiseach” in a sentence: Irish examples

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

Bhí luas tairiseach ag an traein.
The train had a constant speed.
Bhí aimsir thairiseach againn ar feadh seachtaine.
We had steady weather for a week.
Coinnigh na luasanna tairiseacha sa turgnamh.
Keep the speeds constant in the experiment.
Tá an teocht níos tairisí anseo ná amuigh.
The temperature is more constant here than outside.
Tá an brú tairiseach sa phíopa.
The pressure in the pipe is constant.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Constant in Irish: frequently asked questions

What is the Irish for constant?

The Irish for constant is tairiseach (pronounced “TAR-ish-uck”). It comes after the noun: luas tairiseach, a constant speed; aimsir thairiseach, constant weather.

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

níos tairisí is more constant and is tairisí is most constant. In the past tense they become ní ba thairisí and ba thairisí.

Why does tairiseach become thairiseach?

After a feminine singular noun an adjective is lenited: it gets an h after its first letter. So aimsir thairiseach (constant weather) but luas tairiseach (a constant speed), because luas is masculine.

What is the plural of tairiseach?

With a plural noun tairiseach becomes tairiseacha: luasanna tairiseacha, aimsirí tairiseacha.

How do you say very constant in Irish?

an-tairiseach. Too constant is róthairiseach, and as constant as is chomh tairiseach le.

Does tairiseach have more than one meaning?

Yes. Tairiseach can mean constant or loyal, depending on context; the first is the most common.

What is the difference between 'tairiseach' and 'tairise'?

'Tairise' usually means loyal or faithful, while 'tairiseach' is most often used for constant or steady, as in 'luas tairiseach' (constant speed). The noun 'tairiseach' means a constant in mathematics.

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