The Collaborative International Dictionary
Disaccustom
Disaccustom \Dis`ac*cus"tom\, v. t. [Cf. F. d['e]saccoutumer.]
To destroy the force of habit in; to wean from a custom.
--Johnson.
Douglas Harper's Etymology Dictionary
Wiktionary
disaccustom
vb. to cause (someone) to break a habit or become unaccustomed to something that they are previously accustomed to
Usage examples of "disaccustom".
They see the peasant smiles very little, and altogether is not very kindly disposed and wants to disaccustom himself to the authorities.