accustom
Concise Oxford English Dictionary © 2008 Oxford University Press:
accustom/əˈkʌstəm/
▶verb
- 1 make used to: I accustomed my eyes to the lenses.
■ (be accustomed to) be used to.
- 2 (as adj. accustomed) customary; usual.
– origin ME: from OFr. acostumer, from a- (from L. ad ‘to, at’) + costume ‘custom’.
'accustom' also found in these Oxford entries:

