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Clastic in Irish (clastach): Meaning, Forms, Examples

The Irish for clastic is clastach: fear clastach, a clastic man.
Updated October 2026Report a mistake

How to say “clastic” in Irish

Irish:
clastach
English:
clastic
Word type:
adjective
More clastic:
níos clastaí
Most clastic:
is clastaí
Plural:
clastacha
Pronunciation:
“KLAS-tukh”  /ˈkl̪ˠasˠt̪ˠəx/

What does “clastach” mean?

clastic
Describes rock or sediment made up of broken pieces of older rocks.Also: fragmental, detrital.

“Clastach” after a noun

An Irish adjective comes after its noun. Here is clastach after fear (man, masculine), after carraig (rock, feminine) and after a plural.

after a masculine nounfear clastacha clastic man
after a feminine nouncarraig chlastacha clastic rock
after a plural nounfir chlastachaclastic men

séimhiú (the h) the ending

feminine
carraigrock
+
clastachclastic
=
carraig chlastacha clastic rock

After a feminine noun the adjective gets a séimhiú, an h after its first letter: carraig chlastach. After a masculine noun it stays as it is: fear clastach.

plural
firmen
+
clastachaclastic, plural
=
fir chlastachaclastic men

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

More clastic, most clastic, very clastic

níosmore
+
clastaíclastic
=
níos clastaímore clastic
ismost
+
clastaíclastic
=
is clastaímost clastic

Tá an tsraith seo níos clastaí ná an ceann thíos. This layer is more clastic than the one below.

more clasticníos clastaíin the past tense: ní ba chlastaí
most clasticis clastaíin the past tense: ba chlastaí
as clastic aschomh clastach leno change after chomh
very clastican-chlastachan- lenites, except d, t and s
too clasticróchlastachró- lenites

“Clastach” in a sentence: Irish examples

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

Is dríodar clastach é seo.
This is a clastic sediment.
Is carraig chlastach í an ghaineamhchloch.
Sandstone is a clastic rock.
Tá carraigeacha clastacha coitianta sa cheantar seo.
Clastic rocks are common in this area.
Tá an tsraith seo níos clastaí ná an ceann thíos.
This layer is more clastic than the one below.
Tá an chloch seo clastach.
This stone is clastic.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Clastic in Irish: frequently asked questions

What is the Irish for clastic?

The Irish for clastic is clastach (pronounced “KLAS-tukh”). It comes after the noun: fear clastach, a clastic man; carraig chlastach, a clastic rock.

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

níos clastaí is more clastic and is clastaí is most clastic. In the past tense they become ní ba chlastaí and ba chlastaí.

Why does clastach become chlastach?

After a feminine singular noun an adjective is lenited: it gets an h after its first letter. So carraig chlastach (a clastic rock) but fear clastach (a clastic man), because fear is masculine.

What is the plural of clastach?

With a plural noun clastach becomes clastacha: fir chlastacha, carraigeacha clastacha. After a plural that ends in a slender consonant it is lenited as well.

How do you say very clastic in Irish?

an-chlastach. Too clastic is róchlastach, and as clastic as is chomh clastach le.

Is 'clastach' an everyday word?

No, 'clastach' is a technical geology term, used in phrases such as 'carraig chlastach' for clastic rock.

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