To make someone familiar with new conditions. (Cambridge Dictionary)
To make familiar with something through use or experience. (Merriam – Webster)
To familiarise by custom or use; habituate: (Dictionary.com)
If you accustom yourself or another person to something, you make yourself or them become used to it. (Collins Dictionary)
Make someone or something accept (something) as normal or usual. (Oxford Dictionaries)
That Lifestyle You’re Accustomed to Could Be Ruining Your Life.
Accustomed to drinking.
I am accustomed to working long hours during the week.