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Mountainous in Irish (sléibhtiúil): Meaning, Forms, Examples

The Irish for mountainous is sléibhtiúil: ceantar sléibhtiúil, a mountainous area.
Updated October 2026Report a mistake

How to say “mountainous” in Irish

Irish:
sléibhtiúil
English:
mountainous
Word type:
adjective
More mountainous:
níos sléibhtiúla
Most mountainous:
is sléibhtiúla
Plural:
sléibhtiúla
Pronunciation:
“SHLAYV-too-il”  /ˈʃlʲeːvʲtʲuːlʲ/

What does “sléibhtiúil” mean?

mountainous
Describes land or a region that has many mountains.Also: hilly, highland, rugged.

“Sléibhtiúil” after a noun

An Irish adjective comes after its noun. Here is sléibhtiúil after ceantar (area, masculine), after tír (country, feminine) and after a plural.

after a masculine nounceantar sléibhtiúila mountainous area
after a feminine nountír shléibhtiúila mountainous country
after a plural nounceantair shléibhtiúlamountainous areas

séimhiú (the h) the ending

feminine
tírcountry
+
sléibhtiúilmountainous
=
tír shléibhtiúila mountainous country

After a feminine noun the adjective gets a séimhiú, an h after its first letter: tír shléibhtiúil. After a masculine noun it stays as it is: ceantar sléibhtiúil.

plural
ceantairareas
+
sléibhtiúlamountainous, plural
=
ceantair shléibhtiúlamountainous areas

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

More mountainous, most mountainous, very mountainous

níosmore
+
sléibhtiúlamountainous
=
níos sléibhtiúlamore mountainous
ismost
+
sléibhtiúlamountainous
=
is sléibhtiúlamost mountainous

Tá an tuaisceart níos sléibhtiúla ná an deisceart. The north is more mountainous than the south.

more mountainousníos sléibhtiúlain the past tense: ní ba shléibhtiúla
most mountainousis sléibhtiúlain the past tense: ba shléibhtiúla
as mountainous aschomh sléibhtiúil leno change after chomh
very mountainousan-sléibhtiúilan- lenites, except d, t and s
too mountainousróshléibhtiúilró- lenites

“Sléibhtiúil” in a sentence: Irish examples

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

Is ceantar sléibhtiúil é Conamara.
Connemara is a mountainous area.
Thaistil siad trí thír shléibhtiúil.
They travelled through a mountainous country.
Tá na ceantair shléibhtiúla fuar sa gheimhreadh.
The mountainous areas are cold in winter.
Tá an tuaisceart níos sléibhtiúla ná an deisceart.
The north is more mountainous than the south.
Tá an talamh anseo an-sléibhtiúil.
The land here is very mountainous.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Mountainous in Irish: frequently asked questions

What is the Irish for mountainous?

The Irish for mountainous is sléibhtiúil (pronounced “SHLAYV-too-il”). It comes after the noun: ceantar sléibhtiúil, a mountainous area; tír shléibhtiúil, a mountainous country.

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

níos sléibhtiúla is more mountainous and is sléibhtiúla is most mountainous. In the past tense they become ní ba shléibhtiúla and ba shléibhtiúla.

Why does sléibhtiúil become shléibhtiúil?

After a feminine singular noun an adjective is lenited: it gets an h after its first letter. So tír shléibhtiúil (a mountainous country) but ceantar sléibhtiúil (a mountainous area), because ceantar is masculine.

What is the plural of sléibhtiúil?

With a plural noun sléibhtiúil becomes sléibhtiúla: ceantair shléibhtiúla, tíortha sléibhtiúla. After a plural that ends in a slender consonant it is lenited as well.

How do you say very mountainous in Irish?

an-sléibhtiúil. Too mountainous is róshléibhtiúil, and as mountainous as is chomh sléibhtiúil le.

What is the difference between 'sléibhtiúil' and 'cnocach'?

'Sléibhtiúil' comes from 'sliabh' and means mountainous, while 'cnocach' comes from 'cnoc' and means hilly.

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