Accustom has 3 different meanings across 1 category:
Verb
Custom.
make psychologically or physically used (to something)
"She became habituated to the background music"
To make familiar by use; to cause to accept; to habituate, familiarize, or inure.
The word comes from the Old French acoustumer, which combines "to" and "custom." Originally, it meant to make someone used to something familiar.