guardian

guardian /ˈgɑɚdijən/ noun
plural guardians
guardian
/ˈgɑɚdijən/
noun
plural guardians
Britannica Dictionary definition of GUARDIAN
[count]
1 
: someone or something that watches or protects something — often + of
2 
law : someone who takes care of another person or of another person's property

— guardianship

/ˈgɑɚdijənˌʃɪp/ noun [noncount]