- To make (someone) familiar with something through regular exposure.
- To habituate someone to something.
Middle english: from old french accoustumer, from a- (from latin ad "to") + costume "custom".
- She had to accustom herself to the new environment.
- He had to accustom himself to the new diet.
- The company had to accustom its employees to the new software.
- The dog had to accustom itself to the new owner.
- The baby had to accustom itself to the new schedule.