verb 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.
verb To process new information in one's mind.
verb To refrain from expressing (a negative emotion), to one's psychological detriment; to bottle up.
verb To store (a string or other structure) in a shared pool, such that subsequent items with the same value can share the same instance.
verb To transfer stocks between brokers within an organization, rather than through the exchange.