This is the 6879th most frequent Spanish word.
demás
The Spanish word "demás" means "the rest" or "the others" in English.
Here, 'demás' is used to refer to a group of people who are distinct from the speaker.
Los demás ya se fueron a casa.
The others already went home.
In this sentence, 'demás' generalizes to other people without specifying a group, implying external individuals.
No te preocupes por los demás, haz lo mejor para ti.
Don't worry about others, do what's best for you.
Here, 'demás' refers specifically to items (books) that are separate from a previously mentioned subset.