unstir

English

Etymology

From un- +‎ stir.

Verb

unstir (third-person singular simple present unstirs, present participle unstirring, simple past and past participle unstirred)

1. (transitive, intransitive) Hypothetically, to undo the act of stirring or being stirred.
   • 2002, Jim Al-Khalili, Black Holes, Wormholes and Time Machines, page 122:

     Similarly, you cannot 'unstir' the sugar from a cup of coffee once it has been dissolved, and you never see a pile of ash in the fireplace 'unburn' to become a log of wood again.