What is primero in English?

"Primero" is a Spanish word meaning "first". It can also be used in English, but it is less common and usually only used in specific contexts, like when referring to something that is first in order or importance.

For example:

* "Primero de Mayo" (First of May) in Spanish translates to "May Day" in English.

* "El primero de la clase" (The first in the class) could be translated as "The top of the class" in English.

It's generally a good idea to use the English word "first" in most situations.