The woman touched his foot. It felt as hard as an animal horn.
女人碰了碰他的脚。感觉就像动物的角一样坚硬。
英语百科
Horn (anatomy)
A horn is a pointed projection on the head of various animals consisting of a covering of keratin and other proteins surrounding a core of live bone. In mammals, true horns are found mainly among the ruminant artiodactyls, in the families Antilocapridae (pronghorn) and Bovidae (cattle, goats, antelope etc.).