Sharp-wittedly is an adverb that describes someone who speaks or thinks very quickly and cleverly. There are a variety of synonyms that can be used to describe such behavior. Some options include: 1. Quick-wittedly: This term is often used to describe someone who is able to respond to a situation or comment rapidly and with intelligence. 2. Cleverly: This word implies that someone is able to come up with intelligent and creative solutions to problems or situations. 3. Shrewdly: This adjective implies a sense of cunning and strategic thinking, often in a business context. 4. Intellectually: This term implies a high level of intelligence and reasoning, often in an academic or professional context. 5. Astutely: This word implies an ability to see and understand situations clearly and make insightful decisions.