borehole aeration > efface
English Expression:
  1. n.  scraping
  2. n.  pass the [a] sponge over sth.
  3. v.  efface
  4. v.  erase
  5. v.  raze
  6. v.  smear
  7. v.   wipe out
  8. v.   obliterate
  9. v.   bolt out
  10. v.   erase
  11. vt.  swab