burn

A physical injury caused by heat, cold, electricity, radiation or caustic chemicals.

"She had second-degree burns from falling in the bonfire."

A sensation resembling such an injury.

"chili burn from eating hot peppers"

The act of burning something with fire.

"They're doing a controlled burn of the fields."

To cause to be consumed by fire.

"He burned his manuscript in the fireplace."

To be consumed by fire, or in flames.

"He watched the house burn."

To overheat so as to make unusable.

"He burned the toast. The blacksmith burned the steel."