B2 noun /ˈɡɑːr.di.ən/
Guardian
guardián; tutor
Meaning
a defender, protector, or keeper; a person legally responsible for the care of someone unable to manage their own affairs
Example
After her parents died, her uncle became her legal guardian and took care of her.
Después de que sus padres murieron, su tío se convirtió en su guardián legal y se encargó de su cuidado.