The park ranger will warden the forest to prevent fires.

To act as a guardian or overseer, typically in a supervisory capacity.
He will warden the prison.
She must warden the children.
They warden the ancient ruins.
warden the area
warden the property
warden the grounds
guard
oversee
supervise
The warden made sure all the prisoners followed the rules.

A person in charge of the supervision and management of a prison or similar institution.
The warden arrived at the prison.
He spoke to the warden.
The warden was very strict.
prison warden
chief warden
head warden
superintendent
governor
administrator