('computers') Will the program let me 'undo' a change if I make a mistake?
I can't 'undo' [='untie'] this knot.
The damage cannot be 'undone'.
(..) You will spend the rest of your days in the dungeons. And what of Thor? You'll make that witless oaf king while I rot in chains. Thor must strive to undo the damage you have done. He will bring order to the Nine Realms and then, yes... He will be king. (..)2013 Thor: The Dark World