After weeks of neglect, the callus on his heel cornified and became painfully hard.

The horse's hooves developed cornified layers that shielded them from rocky terrain.

When left untreated, the wound cornifies and forms a hard scab that can take weeks to heal.

She spent the afternoon cornifying the costume's headdress, shaping spirals that would catch the light.

Over time, the wounded tissue began to cornify, forming a hard, horn-like layer that protected the area.