"Science fiction writer Robert Heinlein, in the 1961 science
fiction novel Stranger in a Strange Land, coined the term 'grok.'
In the story the word was part of the Martian language:
"'Grok' means to understand so thoroughly that the observer
becomes a part of the observed--to merge, blend, intermarry, lose
identity in group experience. It means almost everything that we
mean by religion, philosophy, and science--and it means as little
to us (because we are from Earth) as color means to a blind
man..."
