Undoes

Undoes is the third-person singular present tense form of the verb undo, meaning to reverse the effect of a prior action. The word is usually seen as a verb; when discussing a reversal as a thing, writers typically use undo or an undo as the noun. The plural undo es can occur when listing multiple reversals, though it is less common as a noun.

In computing and digital tools, an undo operation reverses the most recent change to restore the previous state. Implementations typically use an undo stack or history list to record actions, enabling multi-step reversal and often a corresponding redo. Keyboard shortcuts such as Ctrl+Z (Windows) or Command+Z (macOS) are common. Some actions may be non-undoable or only partially undoable, and some programs limit the number of undos.

For non-software contexts, undo describes reversing outcomes, such as undoing a decision, a change in a design, or a contractual rescission in which a deal is voided and the parties are restored to their original positions.

Limitations include irreversible actions (such as permanent deletion) and the need for systems to maintain history; once the history is cleared, undos are lost.