Reviewer (noun)

1. A person who examines, inspects, or appraises something, such as a book, film, or performance.
2. A person who writes a critical evaluation of something.
3. A person who reviews or assesses something, such as a product or service, for quality or suitability.

Origin:

The word reviewer comes from the late 17th century, derived from the verb 'review' meaning to examine, inspect, or appraise.

Examples:

1. The reviewer was impressed by the quality of the book, and gave it a favorable review.
2. The reviewer criticized the film for its lack of depth and originality.
3. The reviewer was a professional in the field, and was able to provide a thorough and insightful review.
4. The reviewer was hired to assess the performance of the company, and to provide recommendations for improvement.
5. The reviewer was an expert in the subject, and was able to provide a detailed and informative review.