1. incredulous not disposed or willing to believe; unbelieving
  2. incredibility the quality of being incredible
  3. incredible amazing; extraordinarily good or great
  4. incredibly exceedingly; extremely
  5. incredulously in a disbelieving manner
  6. incredulity doubt about the truth of something
  7. incredibleness the quality of being incredible
  8. incorrigible impervious to correction by punishment
  9. credibility the quality of being believable or trustworthy
  10. incorruptibility the incapability of being corrupted
  11. unpredictability the quality of being without a certain outcome
  12. incremental cost the increase or decrease in costs as a result of one more or one less unit of output
  13. pancreatic duct a duct connecting the pancreas with the intestine
  14. ungradable opposition an opposition that has no intermediate grade
  15. incriminatingly in an incriminating manner
  16. mental faculty one of the inherent cognitive or perceptual powers of the mind
  17. difficult requiring great physical or mental effort to accomplish
  18. syncretistical of or characterized by syncretism
  19. uncritical not critical
  20. convertible security a corporate security (usually bonds or preferred stock) that can be exchanged for another form of security (usually common stock)