internalize

verb5

1. •
   To make something internal; to incorporate it in oneself.

   • You are not going to get good at socialising by approaching social situations like it's a formula where you do 1, 2 and 3 from a book, but books can definitely help you internalize useful things if you get what I'm saying.
2. •
   To process new information in one's mind.
3. •
   To refrain from expressing (a negative emotion), to one's psychological detriment; to bottle up.

   • Well, I can't get angry, okay? I mean, I have a tendency to internalize. I can't express anger. That's one of the problems I have—I grow a tumor instead. — 1979
4. •
   To store (a string or other structure) in a shared pool, such that subsequent items with the same value can share the same instance.
5. •
   To transfer stocks between brokers within an organization, rather than through the exchange.