Cavilingly is an adverb that refers to a person who finds fault or complains frequently, even over minor issues. Synonyms for cavilingly include critical, captious, fault-finding, nitpicking, carping, complaining, and hypercritical. These words are often used to describe someone who is excessively critical and hard to please. When someone is cavilingly, they tend to focus on the negatives instead of the positives, often causing frustration and annoyance to those around them. Other synonyms for cavilingly include querulously, peevishly, nigglingly, and pickily. These words can help to add variety to your writing and to communicate a more specific meaning.