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from The American Heritage® Dictionary of the English Language, 4th Edition

  • Not: dissimilar.
  • Absence of: disinterest.
  • Opposite of: disfavor.
  • Undo; do the opposite of: disarrange.
  • Deprive of: disfranchise.
  • Remove: disbud.
  • Free from: disintoxicate.
  • Used as an intensive: disannul.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • reversal or removal
  • apart
  • Used as an intensifier of words with negative valence.

from the GNU version of the Collaborative International Dictionary of English

  • A prefix from the Latin, whence F. dés, or sometimes dé-, dis-. The Latin dis-appears as di-before b, d, g, l, m, n, r, v, becomes dif-before f, and either dis-or di- before j. It is from the same root as bis twice, and duo, E. two. See two, and cf. bi-, di-, dia-. Dis- denotes separation, a parting from, as in distribute, disconnect; hence it often has the force of a privative and negative, as in disarm, disoblige, disagree. Also intensive, as in dissever.
  • A prefix from Gr. di`s- twice. See Di-.


Middle English, from Old French des-, from Latin dis-, apart, asunder.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Middle English, from Old French des-, from Latin dis-. (Wiktionary)



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