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Decimal in Irish (deachúlach): Meaning, Forms, Examples

The Irish for decimal is deachúlach: córas deachúlach, a decimal system.
Updated October 2026Report a mistake

How to say “decimal” in Irish

Irish:
deachúlach
English:
decimal
Word type:
adjective
More decimal:
níos deachúlaí
Most decimal:
is deachúlaí
Plural:
deachúlacha
Pronunciation:
“DAKH-oo-lukh”  /ˈdʲaxuːləx/

What does “deachúlach” mean?

decimal
Based on the number ten or using tenths, as in a decimal number or system.Also: base ten, decimalised.

“Deachúlach” after a noun

An Irish adjective comes after its noun. Here is deachúlach after córas (system, masculine), after uimhir (number, feminine) and after a plural.

after a masculine nouncóras deachúlacha decimal system
after a feminine nounuimhir dheachúlacha decimal number
after a plural nouncórais dheachúlachadecimal systems

séimhiú (the h) the ending

feminine
uimhirnumber
+
deachúlachdecimal
=
uimhir dheachúlacha decimal number

After a feminine noun the adjective gets a séimhiú, an h after its first letter: uimhir dheachúlach. After a masculine noun it stays as it is: córas deachúlach.

plural
córaissystems
+
deachúlachadecimal, plural
=
córais dheachúlachadecimal systems

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

More decimal, most decimal, very decimal

níosmore
+
deachúlaídecimal
=
níos deachúlaímore decimal
ismost
+
deachúlaídecimal
=
is deachúlaímost decimal

Níl córas ar bith níos deachúlaí ná an córas méadrach. No system is more decimal than the metric system.

more decimalníos deachúlaíin the past tense: ní ba dheachúlaí
most decimalis deachúlaíin the past tense: ba dheachúlaí
as decimal aschomh deachúlach leno change after chomh
very decimalan-deachúlachan- lenites, except d, t and s
too decimalródheachúlachró- lenites

“Deachúlach” in a sentence: Irish examples

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

Úsáideann an tír córas deachúlach airgid.
The country uses a decimal money system.
Scríobh an uimhir dheachúlach ar an gclár.
Write the decimal number on the board.
Tá na huimhreacha deachúlacha deacair dom.
The decimal numbers are difficult for me.
Níl córas ar bith níos deachúlaí ná an córas méadrach.
No system is more decimal than the metric system.
Tá an t-airgeadra deachúlach anois.
The currency is decimal now.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Decimal in Irish: frequently asked questions

What is the Irish for decimal?

The Irish for decimal is deachúlach (pronounced “DAKH-oo-lukh”). It comes after the noun: córas deachúlach, a decimal system; uimhir dheachúlach, a decimal number.

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

níos deachúlaí is more decimal and is deachúlaí is most decimal. In the past tense they become ní ba dheachúlaí and ba dheachúlaí.

Why does deachúlach become dheachúlach?

After a feminine singular noun an adjective is lenited: it gets an h after its first letter. So uimhir dheachúlach (a decimal number) but córas deachúlach (a decimal system), because córas is masculine.

What is the plural of deachúlach?

With a plural noun deachúlach becomes deachúlacha: córais dheachúlacha, uimhreacha deachúlacha. After a plural that ends in a slender consonant it is lenited as well.

How do you say very decimal in Irish?

an-deachúlach. Too decimal is ródheachúlach, and as decimal as is chomh deachúlach le.

What is the noun for 'a decimal' in Irish?

The noun is 'deachúil', while 'deachúlach' is the adjective, as in 'pointe deachúlach' (decimal point).

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