nonachieved

non- +‎ achieved

nonachieved (not comparable)

1. Not achieved.
   • 1973, Hans Dieter Seibel, The Dynamics of Achievement: a Radical Perspective, page 6:

     Depending on the extent to which achieved or nonachieved criteria are used to select people for given roles, there may be predominantly achieved roles or predominantly nonachieved roles.

   • 1997, Gary L. Hankinson, The Relationship of Vocational Identity and Other Mitigating Variables to Progress in Substance Dependence Treatment in a Therapeutic Community, page 66:

     those giving fewer than 10 false responses were designated in the nonachieved vocational identity group.

   • 2010, Michael Gelven, Asking Mystery: A Philosophical Inquiry, page 58:

     Leibniz makes an even more curious, brilliant, though dubious, assumption: he admits why and how rely on entirely different ways of thinking; but he suggests these questions are merely different perspectives of the same coherence—they are in harmony, indeed a nonachieved, hence "pre-established," a priori, harmony.

Both unachieved and nonachieved mean not achieved. However, unachieved is used when something is theoretically achievable but one has failed to achieve it, while nonachieved is usually used for something that is innate or inherent, as opposed to something that can be achieved.