"Grievingly" is an adverb that describes an action done with deep sadness and sorrow. Synonyms for this word include mournfully, sorrowfully, bereavedly, and mournfully. Other synonyms for grievingly can be described as forlornly, desolately, wistfully, and lamentably. All of these words convey a sense of profound sadness that comes with the loss of someone or something important. They describe a person's feelings of heartbreak and despair when dealing with the aftermath of tragedy or mourning. Each word has its own tone and emphasis, but all of them depict the same somber and sorrowful mood.