HeyRua Get the app

Thorough in Irish (críochnúil): Meaning, Forms, Examples

Other uses of ‘críochnúil’: businesslike · neat

The Irish for thorough is críochnúil: fear críochnúil, a thorough man.
Updated October 2026Report a mistake

How to say “thorough” in Irish

Irish:
críochnúil
English:
thorough, businesslike, neat
Word type:
adjective
More thorough:
níos críochnúla
Most thorough:
is críochnúla
Plural:
críochnúla
Pronunciation:
“KREE-ukh-nool”  /ˈcɾʲiːəxnˠuːlʲ/

What does “críochnúil” mean?

“Críochnúil” has three alternative meanings. The most common comes first.

thorough
Doing things completely and carefully, finishing every part of a job.Also: complete, finished, meticulous.
2 other meanings: businesslike or neat
2businesslike
Orderly, efficient and methodical in the way you work.Also: methodical, efficient, orderly.
3neat
Tidy and well finished in appearance.Also: tidy, well-finished, shipshape.

“Críochnúil” after a noun

An Irish adjective comes after its noun. Here is críochnúil after fear (man, masculine), after obair (work, feminine) and after a plural.

after a masculine nounfear críochnúila thorough man
after a feminine nounobair chríochnúilthorough work
after a plural nounfir chríochnúlathorough men

séimhiú (the h) the ending

feminine
obairwork
+
críochnúilthorough
=
obair chríochnúilthorough work

After a feminine noun the adjective gets a séimhiú, an h after its first letter: obair chríochnúil. After a masculine noun it stays as it is: fear críochnúil.

plural
firmen
+
críochnúlathorough, plural
=
fir chríochnúlathorough men

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

More thorough, most thorough, very thorough

níosmore
+
críochnúlathorough
=
níos críochnúlamore thorough
ismost
+
críochnúlathorough
=
is críochnúlamost thorough

Tá Seán níos críochnúla ná a dheartháir. Seán is more thorough than his brother.

more thoroughníos críochnúlain the past tense: ní ba chríochnúla
most thoroughis críochnúlain the past tense: ba chríochnúla
as thorough aschomh críochnúil leno change after chomh
very thoroughan-chríochnúilan- lenites, except d, t and s
too thoroughróchríochnúilró- lenites

“Críochnúil” in a sentence: Irish examples

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

Is fear críochnúil é an siúinéir sin.
That carpenter is a thorough man.
Rinne sí obair chríochnúil ar an teach.
She did thorough work on the house.
Tá na hoibrithe críochnúla agus cúramach.
The workers are thorough and careful.
Tá Seán níos críochnúla ná a dheartháir.
Seán is more thorough than his brother.
Tá sí an-chríochnúil ina cuid oibre.
She is very thorough in her work.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Thorough in Irish: frequently asked questions

What is the Irish for thorough?

The Irish for thorough is críochnúil (pronounced “KREE-ukh-nool”). It comes after the noun: fear críochnúil, a thorough man; obair chríochnúil, thorough work.

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

níos críochnúla is more thorough and is críochnúla is most thorough. In the past tense they become ní ba chríochnúla and ba chríochnúla.

Why does críochnúil become chríochnúil?

After a feminine singular noun an adjective is lenited: it gets an h after its first letter. So obair chríochnúil (thorough work) but fear críochnúil (a thorough man), because fear is masculine.

What is the plural of críochnúil?

With a plural noun críochnúil becomes críochnúla: fir chríochnúla, oibreacha críochnúla. After a plural that ends in a slender consonant it is lenited as well.

How do you say very thorough in Irish?

an-chríochnúil. Too thorough is róchríochnúil, and as thorough as is chomh críochnúil le.

Does críochnúil have more than one meaning?

Yes. Críochnúil can mean thorough, businesslike or neat, depending on context; the first is the most common.

What is the opposite of críochnúil?

The opposite is míchríochnúil, meaning careless or slipshod, as in obair mhíchríochnúil, sloppy work.

Is críochnúil related to críoch?

Yes, it comes from críoch, an end or finish, so críochnúil describes someone who finishes things properly.

Learn Irish by
actually speaking it

Learn everyday Irish words like críochnúil through guided conversation with Rua.

7-day free trial. Cancel anytime.

The HeyRua app home screen