With all due consideration,

The Pali *sam-, san-* preffix is the equivalent of the English *com-, con-*. 

Since *samsara* is the opposite of *nibbana*, which is the unconditioned, the most accurate term for qualifying both *samsara* and *sankhara* would be conditioned or conditional, pertaining to conditions. Also, many suttas explain that conditional existence *samsara* is the sum of all conditioned phenomena *sabbe sankhara*.

The conclusions that arise are graphically sketched as follows.

Respectfully


[![enter image description here][1]][1]


  [1]: https://i.sstatic.net/ic8vN.jpg