inseparable
1. [ adjective ] not capable of being separated
Examples:

"inseparable pieces of rock"

Related terms: indivisible
Similar spelling:   inseparably
  inexpiable
  inescapable
  incapable
  inexpugnable
  inexplicable
  inescapably
  inexpungeable
  incapableness
  insuperable
  inexpungible
  inexpert
  inexpressive
  inexperience