15th century, in the meaning defined above
Middle English acustomen "to habituate (reflexive or intransitive)," borrowed from Anglo-French acustumer, acostumer, from a-, prefix forming transitive verbs (going back to Latin ad- ad-) + -customer, costomer, verbal derivative of custume custom entry 1
Synonyms for accustom
Words Related to accustom
accustom
verbaccustom
verb