To comprehend something fully, usually with the aid of one's intuition or empathy. Originated in Robert A. Heinlein's 1961 novel Stranger in a Strange Land. Did you grok that? I know it's a lot to take in.
grok
(grɔk)
tv. to “drink” in a concept or knowledge and assimilate it; to understand something; to appreciate someone or something; to relate to someone or something. I don’t quite grok that. Run it by again, would you?