This is the 3135th most frequent Spanish word.
sino
"Sino" means "but rather" or "but instead" in English.
'Sino' is used here as a conjunction introducing an alternative or correcting information.
No fue Juan quien llegó, sino Pedro.
It wasn't Juan who arrived, but Pedro.
'Sino' functions as a bridge to present what is desired or preferred instead of the previous negated concept.
No quiero dinero, sino justicia.
I don't want money, but justice.
'Sino' is part of the phrase 'sino también', emphasizing an additional positive trait.