To familiarize by custom or use; habituate or inure: as, to accustom one's self to a spare diet; time may accustom one to almost anything; to be accustomed to hard work.Synonyms To habituate, familiarize, inure, harden, train.To be wont or habituated to do anything.To consort or cohabit.n. Custom: as, “individual accustom of life,”