unchange

Etymology

From un- +‎ change.

Verb

unchange (third-person singular simple present unchanges, present participle unchanging, simple past and past participle unchanged)

1. (transitive) To revert or reverse a change
   • 1817, William Hutton, ‎Catherine Hutton, The life of William Hutton:

     Thus I experienced another important change, and one I never wished to unchange.

2. (intransitive) To not change; be unchanging; remain constant
   • 2013, G. Klir, Applied General Systems Research:

     In analysing them we discern various mechanisms which seem to us to cause them to "unchange," to be "things" and thus to survive.