1. imprint mark or stamp with or as if with pressure
  2. impunity exemption from punishment or loss
  3. impound take temporary possession of by legal authority
  4. impend be imminent or about to happen
  5. impatient restless or short-tempered under delay or opposition
  6. implant fix or set securely or deeply
  7. ambient completely enveloping
  8. impact the striking of one body against another
  9. impart bestow a quality on
  10. impudent improperly forward or bold
  11. oil paint paint in which a drying oil is the vehicle
  12. impaired mentally or physically unfit
  13. impuissant lacking physical strength or vigor
  14. appoint assign a duty, responsibility, or obligation to
  15. impanel enter into a list of prospective jurors
  16. impasto painting that applies the pigment thickly so that brush or palette knife marks are visible
  17. impiety unrighteousness by virtue of lacking respect for a god
  18. impinge infringe upon
  19. rampant occurring or increasing in an unrestrained way
  20. impeccant free from sin

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