Definitions for: Undo

[v] remove the outer cover or wrapping of; "Let's unwrap the gifts!"; "undo the parcel"
[v] cause to become loose; "undo the shoelace"; "untie the knot"; "loosen the necktie"
[v] cancel, annul, or reverse an action or its effect; "I wish I could undo my actions"
[v] deprive of certain characteristics
[v] cause the ruin or downfall of; "A single mistake undid the President and he had to resign"

Webster (1913) Definition: Un*do", v. t. [AS. und?n. See 1st Un-, and Do to
1. To reverse, as what has been done; to annul; to bring to

What's done can not be undone. --Shak.

To-morrow, ere the setting sun, She 'd all undo that
she had done. --Swift.

2. To loose; to open; to take to piece; to unfasten; to
untie; hence, to unravel; to solve; as, to undo a knot; to
undo a puzzling question; to undo a riddle. --Tennyson.

Pray you, undo this button. --Shak.

She took the spindle, and undoing the thread
gradually, measured it. --Sir W.

3. To bring to poverty; to impoverish; to ruin, as in
reputation, morals, hopes, or the like; as, many are
undone by unavoidable losses, but more undo themselves by
vices and dissipation, or by indolence.

That quaffing and drinking will undo you, --Shak.

Synonyms: loosen, unmake, untie, unwrap

Antonyms: do, make, wrap, wrap up

See Also: alter, change, change by reversal, destroy, destruct, disconnect, disentangle, expose, open, reverse, ruin, spread, spread out, turn, unbelt, unbrace, unbraid, unbuckle, unbutton, unclip, uncover, unfasten, unfold, unhitch, unknot, unlace, unpick, unpin, unplug, unravel, unscramble, unstaple, unstrap, untangle, unwind, unwire

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