1. indispensable essential
  2. inexpensively with little expenditure of money
  3. indispensability the quality possessed by something that you cannot possibly do without
  4. inexpensive relatively low in price or charging low prices
  5. unresponsive not reacting to some influence or stimulus
  6. intensively in an intensive manner
  7. dispensable capable of being eliminated or done without
  8. indispensableness the quality possessed by something that you cannot possibly do without
  9. expensively in an expensive manner
  10. indisputable not open to question; obviously true
  11. indisposed somewhat ill or prone to illness
  12. indecisively lacking firmness or resoluteness
  13. expansively in an impressively expansive manner
  14. indecisive characterized by lack of firmness in purpose or belief
  15. nondisposable not designed to be thrown away after use
  16. unexpansive showing no tendency to expand
  17. indispose make unwilling
  18. intensive characterized by a heightened level or degree
  19. indiscernible difficult or impossible to perceive
  20. expensive high in price or charging high prices