unsigns

Verb

unsign (third-person singular simple present unsigns, present participle unsigning, simple past and past participle unsigned)

1. (intransitive, transitive) To remove one's signature from (something one has signed).
   • Listen : I say we signed, and there's no unsigning.
     And the voyage is never completed, though some may ask
     What creature is this, with the sea through his eyes looking[?]
     […]
     We signed and there's no unsigning.
     Hell, no, but she rolls
     And she rolls us like foam from her flanks, the gay mulatto.1942, Robert Herring, editor, Life and Letters To-Day, volume 34, page 203
2. (or those acting on behalf of a state) To declare void one's signing of (a treaty).
   • Third, transnational legal process could be used to erode the force of the novel US tactic of unsigning the Rome Treaty.2005, Michael Ignatieff, American Exceptionalism and Human Rights, page 137