1. imperative requiring attention or action
  2. impressionable easily influenced
  3. Impressionism a school of late 19th century French painters who pictured appearances by strokes of unmixed colors to give the impression of reflected light
  4. impromptu with little or no preparation or forethought
  5. impressionism a school of late 19th-century French painters
  6. impressed deeply or markedly affected or influenced
  7. imperialism a policy of extending your rule over foreign countries
  8. impressment the act of forcing someone into government service
  9. impressible easily impressed or influenced
  10. imperceptible impossible or difficult to sense
  11. imprisonment the act of confining someone in a prison
  12. imperceptibly in a manner that is difficult to discern
  13. impression a vague idea in which some confidence is placed
  14. important significant in effect or meaning
  15. impermeable preventing especially liquids to pass or diffuse through
  16. impracticable not capable of being carried out or put into practice
  17. Empire State a Mid-Atlantic state; one of the original 13 colonies
  18. impressionistic of or relating to or based on an impression rather than on facts or reasoning
  19. impressive making a strong or vivid mental image
  20. embarrassed feeling or caused to feel uneasy and self-conscious