What term refers to someone who cleverly engages others with humor?

The term that refers to someone who cleverly engages others with humor is "witty." A witty person has the ability to express themselves in a way that is both amusing and insightful, often using clever wordplay or quick, clever responses that showcase their intelligence and sense of humor. Witty remarks are often well-timed and can enhance social interactions, making the person who is witty enjoyable to be around.

The other options describe different traits. "Indelible" refers to something that is lasting and impossible to remove, typically used in context with memories or impressions. "Torpid" describes a state of inactivity or lethargy, indicating sluggishness or a lack of energy. "Sullen" describes a mood characterized by gloomy silence or sullenness, often expressing displeasure. None of these words capture the essence of engaging others through clever humor.