scour
Definitions
To clean or brighten a surface by rubbing it hard, typically with an abrasive or detergent.
To search a place or area thoroughly and energetically in order to find something.
To move quickly and search through an area, often in a frantic or desperate manner.
Examples
I had to scour the burnt pan for twenty minutes to get it clean.
The detectives began to scour the crime scene for any overlooked evidence.
She had to scour the entire city to find the specific book she needed for her research.