Is it ensure, insure, or assure?
c.1400, "act of covering with scratches or slight cuts," from Old French scarification (14c.), from Late Latin scarificationem (nominative scarificatio), noun of action from past participle stem of scarificare, from Latin scarifare "scratch open," from Greek skariphasthai "to scratch an outline, sketch," from skariphos "pencil, stylus," from PIE root *skribh- "to cut, separate, sift" (see script (n.)).
scarification scar·i·fi·ca·tion (skār'ə-fĭ-kā'shən)
The act of making shallow cuts in the skin.