Grok
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Grok /ˈɡrɒk/ is a neologism coined by American writer Robert A. Heinlein for his 1961 science fiction novel Stranger in a Strange Land.
There is a ‘newer, longer ‘ version the Heinlein originally submitted to the publishers, but they rejected it because it was too long, for the times. (This was before the voluminous ‘DUNE’ hit the market.)
The longer version was published after Heinlein’s death...........
https://www.barnesandnoble.com/w/stranger-in-a-strange-land-robert-a-heinlein/1100171693