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 significant or worthy of note
  5. importunity insistent solicitation and entreaty
  6. opportunity a possibility from a favorable combination of circumstances
  7. importune beg persistently and urgently
  8. importantly in a significant way or to a significant degree
  9. imprudent not sensible, responsible, or wise
  10. impertinent improperly forward or bold
  11. unimportant not important
  12. impudent improperly forward or bold
  13. importunately in a beseeching manner
  14. importing the commercial activity of buying and bringing in goods from a foreign country
  15. impersonate pretend to be someone you are not
  16. import duty a duty imposed on imports
  17. imprint mark or stamp with or as if with pressure
  18. imparting the transmission of information
  19. all-important of the greatest importance
  20. all important of the greatest importance