This is the 46th most frequent Spanish word.
tres
The number three.
The word 'tres' is used as a numeral to indicate the quantity of books, precisely three.
Tengo tres libros para leer.
I have three books to read.
The word 'tres' is used in reference to time, indicating three o'clock.
Ellos llegaron a casa a las tres.
They arrived home at three.
The word 'tres' is used to describe the number of members in a group, emphasizing it as a quantity.