To "disparage" someone means to:

To "disparage" someone means to express a negative opinion of them. This term is often used in contexts where someone speaks or behaves in a way that belittles or demeans another person, often undermining their value or worth. The usage of "disparage" suggests a clear intention to diminish the subject's reputation or standing, which is an important nuance in understanding the term.

The other options present contrasting meanings. Encouraging someone implies a supportive action aimed at boosting their confidence or performance, which is the opposite of disparaging. Supporting someone's endeavors also reflects a positive affirmation and assistance, again contrary to the negativity associated with disparagement. Complimenting someone's efforts involves expressing praise and appreciation, which opposes the critical tone inherent in disparagement. Thus, the choice that accurately captures the essence of "disparage" is the one indicating a negative opinion.