B2 noun /ˈɡɑːr.di.ən/
Guardian
守護者; 後見人
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.
両親が亡くなった後、彼女の叔父は彼女の法的な後見人となり、彼女の世話をしました。