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Thesis in Irish (Téis): Meaning, Pronunciation, Usage

The Irish for thesis is téis, a feminine noun (plural téiseanna).
Updated October 2026Report a mistake

How to say “thesis” in Irish

Irish:
téis
English:
thesis
Word type:
noun
Gender:
feminine, second declension
Pronunciation:
“taysh”  /tʲeːʃ/
Various forms
Plural:
téiseanna (theses)
Genitive singular:
téise, na téise (e.g. teideal na téise, title of the thesis)
Genitive plural:
téiseanna, na dtéiseanna (e.g. liosta na dtéiseanna, the list of theses)

What does “téis” mean?

thesis
A long piece of written research submitted for a university degree, or a proposition put forward for argument.Also: dissertation, proposition.

“Téis” with the article

The plural of thesis in Irish is téiseanna. Here is téis after the article (an t-alt), in the singular and the plural.

an téis
the thesis
No change: d and t are not lenited after an
na téiseanna
the theses
Plural: no change after na

“Téis” in a sentence: Irish examples

Common Irish sentences using téis, the Irish word for thesis.

Tá sí ag scríobh téise ar stair na Gaeilge.
She is writing a thesis on the history of Irish.
Chríochnaigh mé an téis inné faoi dheireadh.
I finally finished the thesis yesterday.
Cé hé stiúrthóir do théise?
Who is your thesis supervisor?
Tá na téiseanna go léir sa leabharlann.
All the theses are in the library.
Chuir sé a théis isteach don dochtúireacht.
He submitted his thesis for the doctorate.
Tá caibidil nua i mo théis.
There is a new chapter in my thesis.
Phléigh an léachtóir an téis sa rang.
The lecturer discussed the thesis in class.

Other nouns in Irish

More everyday Irish nouns to learn next.

Thesis in Irish: frequently asked questions

What is the Irish for thesis?

The Irish for thesis is téis (pronounced “taysh”). It’s a feminine noun and the plural is téiseanna.

How do you pronounce téis in Irish?

Téis is said like “taysh” (IPA /tʲeːʃ/).

What is the plural of thesis in Irish?

The plural of téis is téiseanna; with the article, na téiseanna means “the theses”. The genitive plural is téiseanna, as in liosta na dtéiseanna (the list of theses).

Why does téis change to théis or dtéis?

Irish changes the start of some words after certain words. After mo (my) téis becomes mo théis (lenition), and after ár (our) or i (in) it becomes ár dtéis (eclipsis).

What is the difference between 'téis' and 'tráchtas'?

'Tráchtas' is the more usual word for a dissertation or thesis written for a degree, while 'téis' is also used for a thesis, especially a proposition argued in discussion.

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