This is the 1818th most frequent French word.
eux
Them.
In this sentence, 'eux' contrasts or negates a previous assumption or statement to clarify.
Alex a apporté ces livres, pas eux.
Alex brought these books, not them.
In this context, 'eux' emphasizes the subject 'they', differentiating it from others.
Eux sont responsables de cet événement.
They are responsible for this event.
Here, 'eux' is used to restate and emphasize the individuals already mentioned.