Ac·cus·tom v. t. [imp. & p. p. Accustomed p. pr. & vb. n. Accustoming.] To make familiar by use; to habituate, familiarize, or inure; -- with to.
I shall always fear that he who accustoms himself to fraud in little things, wants only opportunity to practice it in greater. --Adventurer.
Syn: -- To habituate; inure; exercise; train.