guardian

US /ˈɡɑːr.di.ən/
UK /ˈɡɑːr.di.ən/
1.

a defender, protector, or keeper.

:
•
self-appointed guardians of public morality
:
protectordefenderpreserverchampioncustodianwardenguardkeeperconservatorcuratorcaretakerstewardtrusteesupervisor