tortoise – la tortuga
(Pronounced tor-too-gah)
To remember that tortoise is pronounced tor-too-gah (tortuga) in Spanish, use the following mnemonic:
My pet tortoises were impressive. I taught two of them to gamble (tortuga).

Tortuga is feminine, so it's la tortuga. Imagine a lady racing a tortoise.

Examples of tortuga (tortoise) in a sentence
La tortuga camina muy despacio por el jardín.
(The tortoise walks very slowly through the garden.)
Mi hija quiere una tortuga como mascota.
(My daughter wants a tortoise as a pet.)
La tortuga vieja vivió más de cien años.
(The old tortoise lived more than one hundred years.)