Scarify

[Little_Girl]

To scratch or cut the skin of; esp. (Med.), to make
small incisions in, by means of a lancet or scarificator, so as to draw
blood from the smaller vessels without opening a large vein.

[Cami]

to use a scarifier (= a tool with sharp points) to break up and remove unwanted grass or plants that are covering the surface of a lawn (= an area of grass) :