The term SUFFIX FOR 'STETHO' is a five-letter word that is used to complete the crossword puzzle. The answer to this question is SCOPE, which is a suffix meaning 'to look at or examine.' It is derived from the Greek word skopein, which means 'to look at.' This suffix is often used in medical terminology, such as stethoscope, which is an instrument used to listen to the internal sounds of the body.