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accustom (one) to (something)
To familiarize one with something. You need to accustom the new interns to the layout of the building. Seth will accustom you to this project before our next meeting. Accustom yourself to the new software before we start using it more frequently.
accustomed to (something)
Familiar or comfortable with something. This phrase is often used to describe aspects of one's daily routine. Now that she is no longer in school, Stella has become accustomed to staying up late and sleeping until noon. I never thought I would become accustomed to this dusty old warehouse, but now I almost enjoy it here.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
*accustomed to someone or somethingand *accustomed to doing something used to someone or something
; used to or in the habit of doing something. (*Typically: be ~; become ~; grow ~.) The children are accustomed to eating late in the evening.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
Used to something or someone; having the habit of doing something. For example, In Spain we gave up our usual schedule and became accustomed to eating dinner at 10 p.m. Professor Higgins in the musical My Fair Lady (1956) ruefully sang the song "I've Grown Accustomed to Her Face" after his protégé Eliza walked out on him. [Second half of 1400s]
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.