undo

See also: -undo

English

Pronunciation

Etymology 1

From Middle English undōn, from Old English undōn, ondōn (“to undo; undo that which is open; close; release; absolve; abrogate; destroy”), from Proto-Germanic *andadōną (“to undo”), equivalent to un- +‎ do. Cognate with West Frisian ûndwaan, ûntdwaan (“to undo; rid”), Dutch ontdoen (“to undo”).

Verb

undo (third-person singular simple present undoes, present participle undoing, simple past undid, past participle undone)

  1. To reverse the effects of an action. ant. syn.
    Fortunately, we can undo most of the damage to the system by the war.
    • 2011 October 15, Michael Da Silva, “Wigan 1 - 3 Bolton”, in BBC Sport‎:
      But Wigan undid their good work by conceding an avoidable second goal deep into first-half injury time.
  2. To unfasten. ant. syn.
    Could you undo my buckle for me?
  3. (figuratively) To impoverish or ruin, as in reputation; to cause the downfall of.
Synonyms
Antonyms
Translations

Noun

undo (plural undos)

  1. (computing) An operation that reverses a previous action.
    How many undos does this program support?

Etymology 2

Adjective

undo

  1. Misspelling of undue.

Further reading

References

  1. ↑ “undo”, in OED Online , Oxford: Oxford University Press, launched 2000.

Anagrams

Latin

Etymology

From unda (“a wave”)

Pronunciation

  • (Classical) IPA(key): /ˈun.doː/, [ˈʊn.doː]

Verb

undō (present infinitive undāre, perfect active undāvī, supine undātum); first conjugation

  1. I rise in waves.
  2. I overflow with, abound in.
  3. I wave, undulate.

Inflection

   Conjugation of undo (first conjugation)
indicative singular plural
first second third first second third
active present undō undās undat undāmus undātis undant
imperfect undābam undābās undābat undābāmus undābātis undābant
future undābō undābis undābit undābimus undābitis undābunt
perfect undāvī undāvistī undāvit undāvimus undāvistis undāvērunt, undāvēre
pluperfect undāveram undāverās undāverat undāverāmus undāverātis undāverant
future perfect undāverō undāveris undāverit undāverimus undāveritis undāverint
passive present undor undāris, undāre undātur undāmur undāminī undantur
imperfect undābar undābāris, undābāre undābātur undābāmur undābāminī undābantur
future undābor undāberis, undābere undābitur undābimur undābiminī undābuntur
perfect undātus + present active indicative of sum
pluperfect undātus + imperfect active indicative of sum
future perfect undātus + future active indicative of sum
subjunctive singular plural
first second third first second third
active present undem undēs undet undēmus undētis undent
imperfect undārem undārēs undāret undārēmus undārētis undārent
perfect undāverim undāverīs undāverit undāverīmus undāverītis undāverint
pluperfect undāvissem undāvissēs undāvisset undāvissēmus undāvissētis undāvissent
passive present under undēris, undēre undētur undēmur undēminī undentur
imperfect undārer undārēris, undārēre undārētur undārēmur undārēminī undārentur
perfect undātus + present active subjunctive of sum
pluperfect undātus + imperfect active subjunctive of sum
imperative singular plural
first second third first second third
active present — undā — — undāte —
future — undātō undātō — undātōte undantō
passive present — undāre — — undāminī —
future — undātor undātor — — undantor
non-finite forms active passive
present perfect future present perfect future
infinitives undāre undāvisse undātūrus esse undārī undātus esse undātum īrī
participles undāns — undātūrus — undātus undandus
verbal nouns gerund supine
nominative genitive dative/ablative accusative accusative ablative
undāre undandī undandō undandum undātum undātū

Derived terms

Descendants

References

  • undo in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • undo in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • undo in Gaffiot, Félix (1934) Dictionnaire Illustré Latin-Français, Hachette
  • Carl Meissner; Henry William Auden (1894) Latin Phrase-Book‎, London: Macmillan and Co.
    • a thing finds credence, is credible: aliquid fidem habet (vid. also fides under sect. VII., History)
  • redound in The Century Dictionary, The Century Co., New York, 1911
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