undo

un·do

verb \ˌən-ˈdü, ˈən-\

un·did\-ˈdid\un·done\-ˈdən\un·do·ing\-ˈdü-iŋ\

Definition of UNDO

transitive verb

1

: to open or loose by releasing a fastening

2

: to make of no effect or as if not done : make null : reverse

3

a : to ruin the worldly means, reputation, or hopes of <a politician undone by scandal> b : to disturb the composure of : upset <she's come undone> c : seduce 3

intransitive verb

: to come open or apart

— un·do·er \-ˈdü-ər\ noun

Examples of UNDO

1. You can't undo the past.
2. The damage cannot be undone.
3. He was undone by greed.

First Known Use of UNDO

before 12th century

Related to UNDO

Synonyms: demoralize, emasculate, paralyze, unnerve, unman, unstring

Antonyms: nerve

Related Words: debilitate, enervate, enfeeble, neuter, weaken; prostrate, sap, soften, tire, waste; frighten, intimidate, psych (out), scare, terrify, terrorize; daunt, discourage, dishearten, dismay, dispirit; craze, derange, madden, unbalance, unhinge; discompose, disquiet, disturb, faze, perturb, unsettle, upset, weird out

Near Antonyms: fortify, strengthen; embolden, encourage, hearten

see all synonyms and antonyms

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Rhymes with UNDO

accrue, achoo, adieu, ado, Agnew, aircrew, airscrew, anew, askew, babu, Baku, bamboo, battu, battue, bayou, bedew, beshrew, bestrew, bijou, boo-boo, boubou, brand-new, breakthrough, burgoo, cachou, can-do, canoe, caoutchouc, Carew, Cebu, Chonju, construe, Corfu, corkscrew, coypu, CQ, cuckoo, curfew, debut, Depew, doo-doo, ecu, endue, ensue, eschew, floor-through, fondue, fordo, Gansu, Gentoo, Gifu, goo-goo, GQ, ground crew, gumshoe, guru, hairdo, hereto, Hindu, home brew, Honshu, horseshoe, how-to, HQ, Hutu, igloo, imbrue, imbue, IQ, jackscrew, K2, Kansu, karoo, Karoo, kazoo, Khufu, kung fu, Kwangju, leadscrew, lean-to, long view, make-do, Matthew, me-too, mildew, milieu, miscue, misdo, muumuu, non-U, old-shoe, one-two, on view, outdo, perdu, Peru, poilu, prau, preview, pursue, purview, ragout, redo, renew, Renfrew, review, revue, rough-hew, run-through, sandshoe, Sardou, see-through, set-to, setscrew, shampoo, sinew, skiddoo, snafu, snowshoe, soft-shoe, span-new, subdue, surtout, taboo, Taegu, tattoo, thank-you, thereto, thumbscrew, to-do, too-too, tree shrew, undue, unglue, unscrew, untrue, vatu, vendue, venue, virtu, voodoo, wahoo, walk-through, wherethrough, whereto, who's who, worldview, yahoo, yoo-hoo