What is the act of expressing disapproval called?

The act of expressing disapproval is aptly described by the term "reproach." This word implies a gentle criticism or a display of disappointment regarding someone’s actions, often highlighting a perceived failing. When you reproach someone, you are not just voicing disapproval; you are also often conveying an expectation of better behavior or standards.

In contrast, "reprimand" typically refers to a more formal and stern rebuke, which may not capture the nuanced emotion often associated with disapproving feedback. While "recommend" implies offering advice or suggestions, it does not relate to disapproval and instead suggests a positive action. "React" is a broader term that encompasses any response to a situation, without necessarily conveying disapproval. Thus, "reproach" stands out as the most accurate term for the specific act of expressing disapproval.