undo

[ uhn-doo ]
/ ʌnˈdu /

verb (used with object), un·did, un·done, un·do·ing.

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Origin of undo

before 900; Middle English; Old English undōn; cognate with Dutch ontdoen. See un-2, do1

OTHER WORDS FROM undo

un·do·a·ble, adjective

WORDS THAT MAY BE CONFUSED WITH undo

undo undue
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for undo

British Dictionary definitions for undo

undo
/ (ʌnˈduː) /

verb -does, -doing, -did or -done (mainly tr)

(also intr) to untie, unwrap, or open or become untied, unwrapped, etc
to reverse the effects of
to cause the downfall of
obsolete to explain or solve

Derived forms of undo

undoer, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012