The term 'PREFIX WITH METER OR SCOPE' can be solved with the 4-letter word 'PERI'. The prefix 'PERI-' is derived from the Greek word for 'AROUND' or 'ABOUT'. It is commonly used to describe something that is located AROUND or near something else. For example, 'PERIMETER' is the area AROUND the outside of a shape, and 'periscope' is an instrument used to look AROUND corners or over walls. When combined with the words 'METER' or 'SCOPE', it can refer to a device used to measure or observe something from a distance.