This is the 2004th most frequent French word.
alex
"Alex" is a proper noun, typically a shortened form of the name "Alexandre" or "Alexandra."
Here, 'Alex' is used as a proper noun, referring to the name of a specific person.
Alex est un étudiant brillant.
Alex is a brilliant student.
In this case, 'Alex' functions as the direct object of the verb 'inviter,' again a proper noun.
Nous avons invité Alex au dîner.
We invited Alex to dinner.
'Alex' is used to refer to someone directly, serving as the noun subject within the context of the sentence.