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Key number in Irish (Eochairuimhir): Meaning, Pronunciation, Usage

The Irish for key number is eochairuimhir, a feminine noun (plural eochairuimhreacha).
Updated October 2026Report a mistake

How to say “key number” in Irish

Irish:
eochairuimhir
English:
key number
Word type:
noun
Gender:
feminine
Pronunciation:
“OKH-ir-iv-ir”  /ˈɔxəɾʲˌɪvʲəɾʲ/
Various forms
Plural:
eochairuimhreacha (key numbers)
Genitive singular:
eochairuimhreach, na heochairuimhreach (e.g. luach na heochairuimhreach, value of the key number)
Genitive plural:
eochairuimhreacha, na n-eochairuimhreacha (e.g. liosta na n-eochairuimhreacha, the list of key numbers)

What does “eochairuimhir” mean?

key number
A number that serves as a key or reference, such as a code number used to identify or unlock something.Also: code number, key, reference number.

“Eochairuimhir” with the article

The plural of key number in Irish is eochairuimhreacha. Here is eochairuimhir after the article (an t-alt), in the singular and the plural.

an eochairuimhir
the key number
No change: feminine nouns starting with a vowel keep their form after an
na heochairuimhreacha
the key numbers
Plural: na adds h before a vowel

“Eochairuimhir” in a sentence: Irish examples

Common Irish sentences using eochairuimhir, the Irish word for key number.

Cuir isteach an eochairuimhir anseo.
Enter the key number here.
Rinne mé dearmad ar m'eochairuimhir.
I forgot my key number.
Tá eochairuimhir ag teastáil chun an comhad a oscailt.
A key number is needed to open the file.
Scríobh sé síos na heochairuimhreacha go léir.
He wrote down all the key numbers.
Ná tabhair an eochairuimhir d'aon duine.
Don't give the key number to anyone.
Bhí botún san eochairuimhir a chuir mé isteach.
There was a mistake in the key number I entered.
Athraíonn an córas an eochairuimhir gach mí.
The system changes the key number every month.

Other nouns in Irish

More everyday Irish nouns to learn next.

Key number in Irish: frequently asked questions

What is the Irish for key number?

The Irish for key number is eochairuimhir (pronounced “OKH-ir-iv-ir”). It’s a feminine noun and the plural is eochairuimhreacha.

How do you pronounce eochairuimhir in Irish?

Eochairuimhir is said like “OKH-ir-iv-ir” (IPA /ˈɔxəɾʲˌɪvʲəɾʲ/).

What is the plural of key number in Irish?

The plural of eochairuimhir is eochairuimhreacha; with the article, na heochairuimhreacha means “the key numbers”. The genitive plural is eochairuimhreacha, as in liosta na n-eochairuimhreacha (the list of key numbers).

Why does eochairuimhir sometimes have a t or h in front of it?

Irish nouns beginning with a vowel take a prefix after certain words: an eochairuimhir (the key number), a heochairuimhir (her key number), a n-eochairuimhir (their key number), na heochairuimhreacha (the key numbers).

How is 'eochairuimhir' different from 'pasfhocal'?

'Eochairuimhir' is a key number made of digits, while 'pasfhocal' is a password, usually made of letters or words.

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