This is the 917th most frequent Spanish word.
mario
In Spanish, "mario" means "husband."
Here, 'Mario' is used as a proper noun, referring specifically to an individual's name.
Mario es un nombre muy común en España.
Mario is a very common name in Spain.
In this case, 'Mario' refers to a specific person who is being named or commented upon for a particular quality.
Ellos siempre nombran a Mario como un ejemplo de esfuerzo.
They always mention Mario as an example of effort.
Here, 'Mario' is a subject in a statement describing their actions and emotions.