unincorporate

un- +‎ incorporate

unincorporate (third-person singular simple present unincorporates, present participle unincorporating, simple past and past participle unincorporated)

1. To undo or remove the incorporation of.
   • 1987, Paul N. Strassels, The 1986 Tax Reform Act: Making It Work for You:

     And if you are already incorporated, you may want to investigate the possibility of unincorporating, or at least electing subchapter S tax status for your business operations.

   • 1992, The Kiplinger Tax Letter:

     Unincorporating doesn't trigger a pension break in this situation: A doctor liquidated his corporation and terminated its pension coverage, taking lump-sum payout. But he continued practicing as a sole proprietor at the same address ...

2. To not incorporate.
   • 1996, Maura Velázquez-Castillo, The Grammar of Possession (→ISBN), page 104:

     There are consistent semantic differences between incorporating and unincorporating structures, [...]

unincorporate (comparative more unincorporate, superlative most unincorporate)

1. (chiefly law) Not incorporated.

   bodies corporate or unincorporate