Definitions

undo

[uhn-doo] / ʌnˈdu /

VERB

open

Synonyms

STRONGEST

loosen unlock unravel

STRONG

disengage disentangle free loose release unbind unblock unbutton unfasten unloose unloosen untie unwrap

WEAK

unclose unfix unshut unstop

Antonyms

STRONG

button fasten

WEAK

close do up

VERB

nullify, invalidate

Synonyms

STRONGEST

abolish annul destroy mar negate offset overturn quash reverse ruin shatter spoil subvert undermine wipe out wreck

STRONG

abate abrogate annihilate break cancel cramp craze crimp decimate defeat demolish have impoverish injure neutralize outfox outmaneuver outsmart overreach overthrow raze skin smash stymie unsettle upset vitiate wrack

WEAK

bring down bring to naught make waves screw up unbuild

Antonyms

STRONGEST

aid allow assist build construct create grow help permit repair restore support uphold

STRONG

approve balance encourage establish fix mend revive save

WEAK

validate

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The company said the military’s latest proposal would effectively undo those guardrails.

From The Wall Street Journal

A single, highly public moral failure could undo everything.

From Salon

Perhaps he could tell me how to undo all the trouble I had caused!

From Literature

"And so those two things combined would make me undo what I did in December," Miran said.

From Barron's

“And so those two things combined would make me undo what I did in December.”

From The Wall Street Journal