undo

When you undo something, you make it invalid, like when governments undo treaties they've signed in the past. Another way to undo is simply to open: "I couldn't undo the knot on my sneakers, so I just slipped them off."

When we undo something, we cancel out its results, or reverse them. You might try to undo the damage caused by your little sister's baseball, offering to replace your neighbor's broken window. Formally, this verb also means "cause downfall or ruin," so you could say, "His love of power will undo him in the end."

Definitions of undo
  1. verb
    cancel, annul, or reverse an action or its effect
    “I wish I could undo my actions”
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    types:
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    unbrace, unlace, untie
    undo the ties of
    unstrap
    remove the strap or straps from
    unhitch
    unfasten or release from or as if from a hitch
    unpick
    undo (the stitches) of (a piece of sewing)
    unfasten
    cause to become undone
    unbelt
    undo the belt of
    unstaple
    take the staples off
    unclip
    remove the clip from
    unbutton
    undo the buttons of
    unpin
    remove the pins from; unfasten the pins of
    disconnect, unplug
    pull the plug of (electrical appliances) and render inoperable
    unbraid
    undo the braids of
    unknot, unpick, unravel, unscramble, untangle
    become or cause to become undone by separating the fibers or threads of
    disentangle, unwind
    separate the tangles of
    unbuckle
    undo the buckle of
    open, spread, spread out, unfold
    spread out or open from a closed or folded state
    unwire
    undo the wiring of
    unloose, unloosen
    loosen the ties of
    unchain
    remove the chains from
    unlash
    untie the lashing of
    unzip
    open the zipper of
    unbend
    unfasten, as a sail, from a spar or a stay
    roll out, straighten
    straighten by unrolling
    unyoke
    remove the yoke from
    unharness
    remove the harness from
    uncoil
    unwind or untwist
    divaricate
    spread apart
    exfoliate
    spread by opening the leaves of
    grass
    spread out clothes on the grass to let it dry and bleach
    butterfly
    cut and spread open, as in preparation for cooking
    uncross
    change from a crossed to an uncrossed position
    splay
    spread open or apart
    type of:
    change by reversal, reverse, turn
    change to the contrary
  2. verb
    cause to become loose
    undo the shoelace”
    synonyms: loosen, untie
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    type of:
    alter, change, modify
    cause to change; make different; cause a transformation
  3. verb
    remove the outer cover or wrapping of
    undo the parcel”
    synonyms: unwrap
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    Antonyms:
    wrap, wrap up
    arrange or fold as a cover or protection
    type of:
    expose, uncover
    remove all or part of one's clothes to show one's body
  4. verb
    cause the ruin or downfall of
    “A single mistake undid the President and he had to resign”
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    type of:
    ruin
    destroy or cause to fail
  5. verb
    deprive of certain characteristics
    synonyms: unmake
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    Antonyms:
    do, make
    create or design, often in a certain way
    types:
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    destroy, destruct
    do away with, cause the destruction or undoing of
    kill
    destroy a vitally essential quality of or in
    do away with, eliminate, extinguish, get rid of
    terminate, end, or take out
    self-destroy, self-destruct
    do away with oneself or itself
    destruct
    destroy (one's own missile or rocket)
    end
    put an end to
    fracture
    interrupt, break, or destroy
    sweep away, wipe out
    eliminate completely and without a trace
    interdict
    destroy by firepower, such as an enemy's line of communication
    demolish, pulverise, pulverize
    destroy completely
    break apart, break up, disassemble, dismantle, take apart
    take apart into its constituent pieces
    dismantle, level, pull down, rase, raze, take down, tear down
    tear down so as to make flat with the ground
    eradicate, exterminate, extirpate, root out, uproot
    destroy completely, as if down to the roots
    dilapidate
    bring into a condition of decay or partial ruin by neglect or misuse
    demyelinate
    destroy the myelin sheath of
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