"exuberance" means enthusiasm or showing a lot of energy. if someone holds back a cry of pain, that doesn't really make them seem energetic or excited. from that alone, you can infer that "stoicism" is your answer, but that word relates to a pointed lack of emotion, like when someone doesn't want to lose face or show that they're in pain.
One way in which the curate and the barber convince Don Quixote to leave the forest with them is that they "<span>They tell him that Sancho Panza is in trouble and needs help."</span>
