This is the 557th most frequent Spanish word.
quieren
"Quieren" means "they want" or "you (plural) want" in English.
In this sentence, 'quieren' is used to express a desire or want in the third person plural form of the verb 'querer'.
Ellos quieren aprender español.
They want to learn Spanish.
Here, 'quieren' indicates a preference or intention made by a group of people when questioned.
¿Por qué quieren salir tan temprano?
Why do they want to leave so early?
In this case, 'quieren' introduces a desire or wish expressed by the subject regarding another person's state or condition.