1. invincible incapable of being overcome or subdued
  2. principle a basic generalization that is accepted as true
  3. insensible barely able to be perceived
  4. inalienable incapable of being repudiated or transferred to another
  5. unalienable incapable of being repudiated or transferred to another
  6. inland bill a bill of exchange that is both drawn and made payable in the same country
  7. golden spleen any of various low aquatic herbs of the genus Chrysosplenium
  8. indiscipline the trait of lacking discipline
  9. principal main or most important
  10. undiscipline the trait of lacking discipline
  11. insensibly in a numb manner; without feeling
  12. invincibly in an invincible manner
  13. in-line skate a shoe with a line of rollers fixed to the sole
  14. influence peddler someone who intervenes with authorities for a person in trouble (usually using underhand or illegal methods for a fee)
  15. invincibility the property being difficult or impossible to defeat
  16. aniline oil oily poisonous liquid amine obtained from nitrobenzene and used to make dyes and plastics and medicines
  17. indefensible not able to be protected against attack
  18. inalienably in an inalienable manner
  19. plainspoken using simple and direct language
  20. Linus Pauling United States chemist who studied the nature of chemical bonding (1901-1994)