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Diligent in Irish (dlúsúil): Meaning, Forms, Examples

Other uses of ‘dlúsúil’: brisk

The Irish for diligent is dlúsúil: oibrí dlúsúil, a diligent worker.
Updated October 2026Report a mistake

How to say “diligent” in Irish

Irish:
dlúsúil
English:
diligent, brisk
Word type:
adjective
More diligent:
níos dlúsúla
Most diligent:
is dlúsúla
Plural:
dlúsúla
Pronunciation:
“DLOO-sool”  /ˈd̪ˠl̪ˠuːsˠuːlʲ/

What does “dlúsúil” mean?

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

diligent
Working hard and steadily, with energy and care.Also: industrious, hard-working, assiduous, busy.
1 other meaning: brisk
2brisk
Done quickly and energetically.Also: energetic, vigorous.

Other Irish adjectives for diligent: díograiseach (diligent), dícheallach (diligent)

“Dlúsúil” after a noun

An Irish adjective comes after its noun. Here is dlúsúil after oibrí (worker, masculine), after girseach (girl, feminine) and after a plural.

after a masculine nounoibrí dlúsúila diligent worker
after a feminine noungirseach dhlúsúila diligent girl
after a plural nounoibrithe dlúsúladiligent workers

séimhiú (the h) the ending

feminine
girseachgirl
+
dlúsúildiligent
=
girseach dhlúsúila diligent girl

After a feminine noun the adjective gets a séimhiú, an h after its first letter: girseach dhlúsúil. After a masculine noun it stays as it is: oibrí dlúsúil.

plural
oibritheworkers
+
dlúsúladiligent, plural
=
oibrithe dlúsúladiligent workers

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

More diligent, most diligent, very diligent

níosmore
+
dlúsúladiligent
=
níos dlúsúlamore diligent
ismost
+
dlúsúladiligent
=
is dlúsúlamost diligent

Tá Máire níos dlúsúla ná a deartháir. Máire is more diligent than her brother.

more diligentníos dlúsúlain the past tense: ní ba dhlúsúla
most diligentis dlúsúlain the past tense: ba dhlúsúla
as diligent aschomh dlúsúil leno change after chomh
very diligentan-dlúsúilan- lenites, except d, t and s
too diligentródhlúsúilró- lenites

“Dlúsúil” in a sentence: Irish examples

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

Is oibrí dlúsúil é Seán.
Seán is a diligent worker.
Bhí bean dhlúsúil ag obair sa siopa.
A hard-working woman was working in the shop.
Tá na daltaí dlúsúla ag déanamh a gcuid obair bhaile.
The diligent pupils are doing their homework.
Tá Máire níos dlúsúla ná a deartháir.
Máire is more diligent than her brother.
Tá sí an-dlúsúil ina cuid oibre.
She is very diligent in her work.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Diligent in Irish: frequently asked questions

What is the Irish for diligent?

The Irish for diligent is dlúsúil (pronounced “DLOO-sool”). It comes after the noun: oibrí dlúsúil, a diligent worker; girseach dhlúsúil, a diligent girl.

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

níos dlúsúla is more diligent and is dlúsúla is most diligent. In the past tense they become ní ba dhlúsúla and ba dhlúsúla.

Why does dlúsúil become dhlúsúil?

After a feminine singular noun an adjective is lenited: it gets an h after its first letter. So girseach dhlúsúil (a diligent girl) but oibrí dlúsúil (a diligent worker), because oibrí is masculine.

What is the plural of dlúsúil?

With a plural noun dlúsúil becomes dlúsúla: oibrithe dlúsúla, girseacha dlúsúla.

How do you say very diligent in Irish?

an-dlúsúil. Too diligent is ródhlúsúil, and as diligent as is chomh dlúsúil le.

Does dlúsúil have more than one meaning?

Yes. Dlúsúil can mean diligent or brisk, depending on context; the first is the most common.

How is 'dlúsúil' different from 'gnóthach'?

'Dlúsúil' describes someone who works hard and steadily by nature, while 'gnóthach' means busy at the moment, as in 'Tá mé gnóthach inniu'.

What noun is 'dlúsúil' related to?

It comes from 'dlús', meaning diligence or speed, as in 'cuir dlús leis' (hurry it up).

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