1. infuriating extremely annoying or displeasing
  2. infolding the folding in of an outer layer so as to form a pocket in the surface
  3. inoculating the act of protecting against disease by introducing a vaccine into the body to induce immunity
  4. unfolding a developmental process
  5. enfolding the action of enfolding something
  6. inference something that is inferred
  7. invigorating imparting strength and vitality
  8. ingratiating capable of winning favor
  9. information knowledge acquired through study or experience
  10. unforbearing unwilling to endure
  11. informing to furnish incriminating evidence to an officer of the law
  12. annihilating wreaking or capable of wreaking complete destruction
  13. enervating causing weakness or debilitation
  14. inverted hang a hang performed on the rings with the body upside down
  15. unforgiving unwilling or unable to forgive or show mercy
  16. invalidating establishing as invalid or untrue
  17. information age a period beginning in the last quarter of the 20th century when information became easily accessible through publications and through the manipulation of information by computers and computer networks
  18. insulting expressing extreme contempt
  19. investing the act of investing
  20. infringe advance beyond the usual limit