There are a variety of synonyms for the word "lamentingly," which can be used to express feelings of sadness, grief, or regret. Some possible alternatives include "mournfully," "woefully," "regretfully," "sorrowfully," "plaintively," "melancholically," "pitifully," "pathetically," "disconsolately," "despairingly," and "dejectedly." Each of these words carries a slightly different nuance of emotion, allowing writers to choose the term that best captures the specific tone they wish to convey. Whether used in a fictional narrative, a personal reflection, or a news article, synonyms for "lamentingly" can enhance the power of language and evoke strong emotional responses from readers.