1. once in a while now and then or here and there
  2. agnostic a person who claims the existence of God is unknowable
  3. insanely (used as intensives) extremely
  4. insinuate suggest in an indirect or covert way; give to understand
  5. occasionally now and then or here and there
  6. conscience motivation deriving from ethical or moral principles
  7. incentive a positive motivational influence
  8. occasional occurring from time to time
  9. insane afflicted with or characteristic of mental derangement
  10. enceinte in an advanced stage of pregnancy
  11. insidious working or spreading in a hidden and usually injurious way
  12. incense make furious
  13. insanity relatively permanent disorder of the mind
  14. ancillary furnishing added support
  15. instill impart gradually
  16. ozone hole an area of the ozone layer (near the poles) that is seasonally depleted of ozone
  17. arsenal all the weapons and equipment that a country has
  18. aniline oil oily poisonous liquid amine obtained from nitrobenzene and used to make dyes and plastics and medicines
  19. unseeable impossible or nearly impossible to see
  20. uncivil lacking civility or good manners