accustom/əˈkʌs.təm/EtymologyThe verb is from Middle English accustomen, from Old French acoustumer, acustumer (Modern French accoutumer) corresponding to a (“to, toward”) + custom. More at custom, costume. The noun is from Middle English acustom.nounCustom.verbTo make familiar by use; to cause to accept; to habituate, familiarize, or inure.“Early exposure to pet allergens and pet-related bacteria accustoms the body to allergens.”To be wont.“all of them accustoming , once in the year , to take their kind of the fresh water”To cohabit.“Much better do we Britans fulfill the work of Nature than you Romans; we with the beſt men accuſtom op'nly; you with the baſest commit private adulteries.”