unassert

un- +‎ assert

unassert (third-person singular simple present unasserts, present participle unasserting, simple past and past participle unasserted)

1. (transitive) To take back a previous assertion; to recant something.
   • '10 June, 1839, Thomas Carlyle, Sinking of the Vengeur

     I, having once been led to assert the fable, hold myself bound, on all fit occasions, to unassert it with equal emphasis.

• Transues, anestrus, saunters, sea turns, seruants