Source : Webster's Revised Unabridged Dictionary (1913)

Scarify \Scar"i*fy\, v. t. [imp. & p. p. {Scarified}; p. pr. &
   vb. n. {Scarifying}.] [F. scarifier, L. scarificare,
   scarifare, fr. Gr. ? to scratch up, fr. ? a pointed
   instrument.]
   1. 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.

   2. (Agric.) To stir the surface soil of, as a field.

Source : WordNet®

scarify
     v 1: puncture and scar (the skin), as for purposes or tribal
          identification or rituals; "The men in some African
          tribes scarify their faces"
     2: scratch the surface of; "scarify seeds"
     3: break up; "scarify soil"
     [also: {scarified}]