1. important significant in effect or meaning
  2. importunate making persistent or urgent requests
  3. imperative requiring attention or action
  4. importance the quality of being worthy of note
  5. importunity insistent solicitation and entreaty
  6. unimportant not important
  7. opportunity a possibility from a favorable combination of circumstances
  8. imprudent not sensible, responsible, or wise
  9. importune beg persistently and urgently
  10. importantly in a significant way or to a significant degree
  11. all important of the greatest importance
  12. impertinent improperly forward or bold
  13. impudent improperly forward or bold
  14. all-important of the greatest importance
  15. unimportance the state of being humble and unimportant
  16. importunately in a beseeching manner
  17. importing the commercial activity of buying and bringing in goods from a foreign country
  18. impersonate pretend to be someone you are not
  19. imprint mark or stamp with or as if with pressure
  20. impatient restless or short-tempered under delay or opposition