undoer

Variant of undo

undo definition

undo (un do̵̅o̅′)

transitive verb undid -·did′, undone -·done′, undoing -·do′·ing

    1. to release or untie (a fastening)
    2. to open (a parcel, door, etc.) by this means
  2. to reverse the doing of (something accomplished); do away with; cancel; annul
  3. to put an end to; bring to ruin, disgrace, or downfall
  4. to upset emotionally; perturb
  5. Obsolete to interpret; explain

Etymology: ME undon < OE < un-, un- + don, to do

Related Forms:

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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