An "aggrieved expression" typically conveys a feeling of hurt or resentment, often due to an injustice or perceived wrongdoing. There are several synonyms that can be used to describe this facial expression, including "indignant," which connotes anger or righteous displeasure, "disgruntled," which suggests a sense of dissatisfaction or frustration, and "crestfallen," which implies a feeling of disappointment or sadness. Other possible synonyms include "perturbed," "distressed," "displeased," "offended," and "hurt." Depending on the context and tone of a situation, any of these words could appropriately describe an aggrieved expression and the emotions it conveys.