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

  • transitive v. To render (a person) unaccustomed to something to which the person has been previously accustomed; cause to break a habit.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • v. to cause (someone) to break a habit or become unaccustomed to something that they are previously accustomed to

from the GNU version of the Collaborative International Dictionary of English

  • transitive v. To destroy the force of habit in; to wean from a custom.

from The Century Dictionary and Cyclopedia

  • To cause to lose a habit by disuse; render unaccustomed as by disuse: as, he has disaccustomed himself to exercise.


Middle English disacustome, from Old French desacostumer : des-, dis- + acostumer, to accustom; see accustom.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Middle English disacustome; compound of dis +‎ accustom (Wiktionary)


  • They see the peasant smiles very little, and altogether is not very kindly disposed and wants to disaccustom himself to the authorities.


  • Do you know what to advise to my friend - to disaccustom to alc ... "

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  • 1881 H. James Portrait of Lady xxxii, Disaccustomed to living with an invalid.

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