habituate

Concise Oxford English Dictionary © 2008 Oxford University Press:
habituate/həˈbɪtʃʊeɪt/

▶verb make or become accustomed to something.

– derivatives
habituation noun.

– origin C15 (earlier (ME) as habituation): from late L. habituat-, habituare ‘accustom’, from habitus (see habit).