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Appendix in Irish (Aguisín): Meaning, Pronunciation, Usage

‘aguisín’ also means: addition

The Irish for appendix is aguisín, a masculine noun (plural aguisíní).
Updated October 2026Report a mistake

How to say “appendix” in Irish

Irish:
aguisín
English:
appendix, addition
Word type:
noun
Gender:
masculine, fourth declension
Pronunciation:
“AG-ish-een”  /ˈaɡɪʃiːnʲ/
Various forms
Plural:
aguisíní (appendices)
Genitive singular:
aguisín, an aguisín (e.g. teideal an aguisín, the title of the appendix)
Genitive plural:
aguisíní, na n-aguisíní (e.g. liosta na n-aguisíní, the list of appendices)

What does “aguisín” mean?

“Aguisín” has two alternative meanings. The most common comes first.

appendix
A section of extra material added at the end of a book or document.Also: addendum, annex, supplement.
1 other meaning: addition
2addition
Something added on to something else, such as an extra clause or remark.Also: rider, tag, add-on.

“Aguisín” with the article

The plural of appendix in Irish is aguisíní. Here is aguisín after the article (an t-alt), in the singular and the plural.

an t-aguisín
the appendix
Masculine nouns take t before a vowel after an
na haguisíní
the appendices
Plural: na adds h before a vowel

“Aguisín” in a sentence: Irish examples

Common Irish sentences using aguisín, the Irish word for appendix.

Tá na figiúirí go léir san aguisín.
All the figures are in the appendix.
Chuir sé aguisín leis an tuarascáil.
He added an appendix to the report.
Féach ar an aguisín ag deireadh an leabhair.
Look at the appendix at the end of the book.
Tá trí aguisín sa tráchtas seo.
There are three appendices in this thesis.
Léigh mé leathanach deireanach an aguisín.
I read the last page of the appendix.
Cuirfidh mé na táblaí i m'aguisín.
I will put the tables in my appendix.
Rinneadh aguisín leis an gconradh inné.
An addendum was made to the contract yesterday.

Other nouns in Irish

More everyday Irish nouns to learn next.

Appendix in Irish: frequently asked questions

What is the Irish for appendix?

The Irish for appendix is aguisín (pronounced “AG-ish-een”). It’s a masculine noun and the plural is aguisíní. Depending on context it can also mean addition.

How do you pronounce aguisín in Irish?

Aguisín is said like “AG-ish-een” (IPA /ˈaɡɪʃiːnʲ/).

What is the plural of appendix in Irish?

The plural of aguisín is aguisíní; with the article, na haguisíní means “the appendices”. The genitive plural is aguisíní, as in liosta na n-aguisíní (the list of appendices).

Does aguisín have more than one meaning?

Yes. Aguisín can mean appendix or addition, depending on context; the first is the most common.

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

Irish nouns beginning with a vowel take a prefix after certain words: an t-aguisín (the appendix), a haguisín (her appendix), a n-aguisín (their appendix), na haguisíní (the appendices).

Can 'aguisín' mean the appendix in the body?

No, the body part is 'aipindic'; 'aguisín' is an appendix in a book or document.

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