1. interest rate the percentage of a sum of money charged for its use
  2. interstate of relations between individual divisions of a country
  3. underestimate make too low an approximation of
  4. intrastate relating to or existing within the boundaries of a state
  5. interested showing curiosity or fascination or concern
  6. intermittent stopping and starting at irregular intervals
  7. interstratify arrange rocks in alternating strata
  8. understate represent as less significant or important
  9. interest a sense of concern with and curiosity about something
  10. interesting arousing or holding the attention
  11. interpenetrate penetrate mutually or be interlocked
  12. untrustworthy not worthy of trust or belief
  13. understated exhibiting restrained good taste
  14. understand know and comprehend the nature or meaning of
  15. interpret make sense of; assign a meaning to
  16. intermediate lying between two extremes in time, space, or state
  17. interest group (usually plural) a social group whose members control some field of activity and who have common aims
  18. intersperse introduce into one's writing or speech (certain expressions)
  19. interstice small opening between things
  20. androsterone an androgenic hormone that is less active than testosterone