prince
The Spanish word 'príncipe' translates to 'prince' in English. It is commonly used to refer to a male royal ruler of a small country, or a monarch's son. The word 'príncipe' comes from the Latin word 'princeps', meaning 'first in time or order; the chief, most distinguished, ruler, prince.' It can also be used metaphorically to refer to someone pre-eminent in a particular field or someone viewed as a superior example.
The prince is noble.
This sentence is using the word 'prince' to describe a male member of a royal family as being noble. It's a simple statement of fact.
A prince should be brave.
This sentence is a universal conditional statement. It is stating what characteristics a 'prince' should possess, in this case: bravery.
The blue prince does not exist.
This phrase is referring to the concept of a 'prince charming' or the ideal man. When it says 'the blue prince' does not exist, it's a way of expressing that the 'perfect' man, or 'prince charming', does not exist in reality.