# undo
## English
### Pronunciation

* (US, UK) IPA: /ʌnˈduː/
* Audio (Southern England):(file)
* Rhymes: -uː
* Homophone: undue (yod-dropping)

### Etymology 1

From Middle English undōn, from Old English ondōn, from Proto-West Germanic *andadōn (“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) (transitive)
* To reverse the effects of an action.
    Fortunately, we can undo most of the damage to the system by the war.
** 1610–1611 (date written), William Shakespeare, “The Tempest”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, [Act I, scene ii], page 4:Pro. […] it was a torment / To lay vpon the damn'd, which Sycorax / Could not againe vndoe ; it was mine Art, / When I arriu'd, and heard thee, that made gape / The Pyne, and let thee out.
** 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.
** 2019 April 6, Caleb Quinley, “Thailand: Anti-military party leader faces sedition charges”, in Al Jazeera‎, Doha: Al Jazeera, retrieved 2019-04-06:And judging by how well the progressive and youth-favoured party did, many observers suspect this latest round of legal charges are a response to Future Forward's commitment to undo the legacy of military rule and undertake democratic reforms.
* To unfasten.
    Could you undo my buckle for me?
* (figuratively) To impoverish or ruin, as in reputation; to cause the downfall of.
** 1611, The Holy Bible, […] (King James Version), London: […] Robert Barker, […], →OCLC:Woe is me, for I am undone!

##### Synonyms

* (reverse effects): cancel, reverse
* (unfasten): unbuckle, unbutton, untie, unzip

##### Antonyms

* (antonym(s) of “reverse effects”): redo
* (antonym(s) of “unfasten”): do up, button, button up, tie up, zip, zip up,

##### Derived terms

* what's done cannot be undone

##### Descendants

* → Welsh: andwyo

##### Translations
#### Noun

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

##### Translations
### Etymology 2
#### Adjective

undo
* Misspelling of undue.

### Further reading

* undo on Wikipedia.Wikipedia

### References

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

### Anagrams

* udon

## Latin
### Etymology

From unda (“a wave”).

### Pronunciation

* (Classical Latin) IPA: /ˈun.doː/, [ˈʊn̪d̪oː]
* (modern Italianate Ecclesiastical) IPA: /ˈun.do/, [ˈun̪d̪o]

### Verb

undō (present infinitive undāre, perfect active undāvī, supine undātum); first conjugation
* to rise in waves
* to overflow with, abound in
* to wave, undulate

#### Derived terms

* abundō
* exundō
* redundō

#### Descendants

* Aromanian: undedz, undari
* → English: undate
* Italian: ondare
* Portuguese: undar
* Romanian: unda, undare
* Spanish: ondear

### 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)
* William Dwight Whitney, Benjamin E[li] Smith, editors (1911), “redound”, in The Century Dictionary […], New York, N.Y.: The Century Co., →OCLC.

## Lindu
### Noun

undo
* flattery

## Old English
### Pronunciation

* IPA: /ˈunˌdoː/

### Verb

undō
* inflection of undōn:
** first-person singular present indicative
** singular present subjunctive
** singular imperative