Here's a breakdown of the phrase:
* O: This is a definite article similar to "the" in English.
* te: This is also a definite article, meaning "the"
* reo: This means "language"
* Māori: This is the name of the indigenous people of New Zealand and their language.
So, "O te reo Māori" is a formal and respectful way to refer to the Māori language.