tutelage C2+

/ˈtuːtəlɪdʒ/ instruction or guardianship under a teacher or protector

tutorial C2+

/tuˈtɔriəl/ a session or guide giving instruction in a particular subject

tutelar C2+

/ˈtuːtɪlɚ/ serving as a protector or guardian; tutelary

tutelary C2+

/ˈtuːtɪlɛri/ having the role of a guardian or protector