When it comes to finding synonyms for the phrase "with mercy," there are a number of options to choose from, each of which captures a slightly different nuance. For example, you might say "compassionately," which connotes a sense of deep empathy and understanding for the person or situation in question. Alternatively, you could use "charitably," which speaks to a sense of generosity and willingness to give without expecting anything in return. "Forgivingly" is another potential synonym, emphasizing the idea of letting go of anger and resentment towards someone who has wronged you. Whatever word you choose, the underlying message is one of kindness and compassion, which can make all the difference in someone's life.