glumly

This adverb conveys a specific blend of sadness and silence, often suggesting a mood of brooding or sullen disappointment. It differs from "sadly" in that it implies a certain level of gloominess or a refusal to be cheered up, often manifesting as a physical expression of misery, such as a pout or a vacant stare.

Because it describes a state of mood rather than a sudden emotion, it is frequently used to describe how someone performs a repetitive or passive action, such as sitting, staring, or waiting, while trapped in a negative mental state.