guardian
🇺🇸
/ˈɡɑːrdiən/
🇬🇧
/ˈɡɑːdiən/
a person who protects or looks after something
Parents are the natural guardians of their children.
親は子供の自然な保護者です。
a person legally responsible for someone else, especially a child without parents
The court named her aunt as the child's legal guardian.
裁判所は彼女の叔母を子供の法的保護者に指名しました。