different between undo vs unthink

English

Pronunciation

• (US, UK) IPA^(key): /?n?du?/
• Rhymes: -u?
• Homophone: undue (in yod dropping dialects)

Etymology 1

From Middle English und?n, from Old English ond?n, from Proto-Germanic *andad?n? (“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)

1. To reverse the effects of an action.

   Fortunately, we can undo most of the damage to the system by the war.
2. To unfasten.

   Could you undo my buckle for me?

3. (figuratively) To impoverish or ruin, as in reputation; to cause the downfall of.
   • 1611, King James Bible

     Woe is me, for I am undone!

Synonyms

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

Antonyms

• (reverse effects): redo
• (unfasten): do up, button, button up, tie up, zip, zip up,

Translations

Noun

undo (plural undos)

1. (computing) An operation that reverses a previous action.

   How many undos does this program support?

Translations

Etymology 2

Adjective

undo

1. Misspelling of undue.

Further reading

• undo on Wikipedia.Wikipedia

References

Anagrams

• udon

Latin

Etymology

From unda (“a wave”)

Pronunciation

• (Classical) IPA^(key): /?un.do?/, [??n?d?o?]
• (Ecclesiastical) IPA^(key): /?un.do/, [?un?d??]

Verb

und? (present infinitive und?re, perfect active und?v?, supine und?tum); first conjugation

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

Conjugation

Derived terms

• abund?
• redund?

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?^[3], London: Macmillan and Co.
• redound in The Century Dictionary, New York, N.Y.: The Century Co., 1911.

Lindu

Noun

undo

1. flattery

English

Etymology

un- +? think

Verb

unthink (third-person singular simple present unthinks, present participle unthinking, simple past and past participle unthought)

1. (transitive, intransitive) To undo the process of thinking.
   • 1930, G. K. Chesterton, The Resurrection of Rome

     They at least had the immense and mighty imagination of which I speak; they could unthink the past. They could uncreate the Fall. With a reverence which moderns might think impudence, they could uncreate the Creation.

   • 2006, Kirsten Shepherd-Barr, Science on Stage: From Doctor Faustus to Copenhagen

     In An Experiment with an Air-Pump, characters repeatedly assert that "once you've thought something, you can't unthink it, can you?"

See also

• unring