callus

An area of skin that is thick or hard from continual pressure or friction (as the sole of the foot).

Bony tissue formed during the healing of a fractured bone.

(botany) an isolated thickening of tissue, especially a stiff protuberance on the lip of an orchid.

Cause a callus to form on.

“The long march had callused his feet”

Form a callus or calluses.

“His foot callused”