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

Other uses of ‘deachúil’: decimal fraction (noun, feminine)

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

How to say “decimal” in Irish

Irish:
deachúil
English:
decimal
Word type:
adjective
More decimal:
níos deachúla
Most decimal:
is deachúla
Plural:
deachúla
Pronunciation:
“DAKH-ool”  /ˈdʲaxuːlʲ/

What does “deachúil” mean?

decimal
Based on the number ten, or written using a decimal point.Also: base ten, denary.
Other entries for “deachúil”

The same spelling has its own page as:

“Deachúil” after a noun

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

after a masculine nouncóras deachúila decimal system
after a feminine nounuimhir dheachúila decimal number
after a plural nouncórais dheachúladecimal systems

séimhiú (the h) the ending

feminine
uimhirnumber
+
deachúildecimal
=
uimhir dheachúila decimal number

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

plural
córaissystems
+
deachúladecimal, plural
=
córais dheachúladecimal systems

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

More decimal, most decimal, very decimal

níosmore
+
deachúladecimal
=
níos deachúlamore decimal
ismost
+
deachúladecimal
=
is deachúlamost decimal

Níl córas ar bith níos deachúla ná é seo. No system is more decimal than this one.

more decimalníos deachúlain the past tense: ní ba dheachúla
most decimalis deachúlain the past tense: ba dheachúla
as decimal aschomh deachúil leno change after chomh
very decimalan-deachúilan- lenites, except d, t and s
too decimalródheachúilró- lenites

“Deachúil” in a sentence: Irish examples

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

Tá córas deachúil ag an airgead anois.
The money has a decimal system now.
Scríobh an uimhir dheachúil ar an gclár.
Write the decimal number on the board.
Bhí na codáin dheachúla deacair don rang.
The decimal fractions were difficult for the class.
Níl córas ar bith níos deachúla ná é seo.
No system is more decimal than this one.
Tá an córas tomhais deachúil.
The measuring system is decimal.

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 deachúil (pronounced “DAKH-ool”). It comes after the noun: córas deachúil, a decimal system; uimhir dheachúil, a decimal number.

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

níos deachúla is more decimal and is deachúla is most decimal. In the past tense they become ní ba dheachúla and ba dheachúla.

Why does deachúil become dheachúil?

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

What is the plural of deachúil?

With a plural noun deachúil becomes deachúla: córais dheachúla, uimhreacha deachúla. After a plural that ends in a slender consonant it is lenited as well.

How do you say very decimal in Irish?

an-deachúil. Too decimal is ródheachúil, and as decimal as is chomh deachúil le.

How do I say 'decimal point' in Irish?

It is 'pointe deachúlach', for example 'a trí pointe a cúig' for 3.5.

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