General:
* Separable
* Divisible
* Solvable
* Removable
* Disentangled
* Independent
Specific:
* Unconnected (if referring to a relationship)
* Loose (if referring to a connection)
* Distinguishable (if referring to something that's hard to separate)
* Detachable (if referring to something that's hard to remove)
The best antonym will depend on the specific meaning of "inextricable" in your sentence.