Final answer:
The term that best describes being 'unaffected by pleasure or pain' is 'stoical,' which denotes endurance without complaint.
Step-by-step explanation:
The word that describes being 'seemingly unaffected by pleasure or pain' is stoical. Someone who is stoical often endures pain or hardship without showing their feelings or complaining. The provided passages evoke various moods and circumstances that require different degrees of stoicism. For example, the sobbing woman with a 'suspension of intelligent thought' and the warriors who display a combination of indifferent nobility and stoic acceptance in the face of suffering. These characters embody the essence of being unaffected by their emotional or physical conditions, aligning with the concept of stoicism.