tr.v. dis·ac·cus·tomed, dis·ac·cus·tom·ing, dis·ac·cus·toms
To render (a person) unaccustomed to something to which the person has been previously accustomed; cause to break a habit.
[Middle English disacustome, from Old French desacostumer : des-, dis- + acostumer, to accustom; see accustom.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(usually foll by: to) to cause to lose a habit
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
dis•ac•cus•tom(ˌdɪs əˈkʌs təm)
to free of a habit.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Past participle: disaccustomed
Collins English Verb Tables © HarperCollins Publishers 2011