unget

verb3

1. •
   The opposite action of get (in various senses)
2. •
   To cause to be unbegotten or unborn, or as if unbegotten or unborn.

   • I'll disovvn you, I'll disinherit you, I'll unget you! — 1775
3. •
   To unacquire; relinquish; release; get rid of; lose; lose hold of; forget

   • He felt himself in the position that having got the conviction he did not see how he was to unget it. — 1893