What is the plural of "tesis"?

Question

In English, the plural of "thesis" is "theses". What is the plural of "tesis" in Spanish?

Welcome to the forum:) - 00494d19, Sep 1, 2010

Answer 1

I found this for you, forming of plural:

Si acaban en –s o –x pero son palabras llanas o esdrújulas, no varían en el plural (la tesis / las tesis; el tórax / los tórax).

Answer 2

"tesis" is a word that remains unchanged in its plural mode.

Tesis es una palabra que permanece igual en su modo plural.

This have been my first intervention in SpanishDict forum!!! :) - crucesignatus, Aug 4, 2015

Answer 3

Here I found a Spanish newspaper where you can see tesis can be both, singular and plural, with no change in its form:

http://www.elpais.com/articulo/sociedad/tesis/doctorales/tendran/hacerse/anos/elpepisoc/20100713elpepisoc_3/Tes

Gracias!! - rmahika, Sep 1, 2010

Answer 4

Another example:

singular

Tengo que hacer un esfuerzo para terminar mi tesis pronto.

• I have to make an effort to finish my thesis soon.

plural

Han sido presentadas muchas tesis.

• Many theses have been presented.

Answer 5

The word "Tesis" is pronounced equally in plural or in singular.

By example:

En la biblioteca hay muchas tesis.

In the library there are many theses.

Estoy investigando para mi tesis.

I am researching for my thesis.

The word remains the same!