Grocks (from English: to grok) is a verb that roughly means "fully understand" or, more formally, "intuitively understand". The concept was introduced by science fiction writer Robert Heinlein in his book Stranger in a Strange Land. It is part of the fictional Marstal language, and is introduced to English speakers by a man raised by Marshmen. In the Maral language it literally means "drinking", but it is used in a much broader context. A character from the book defines it as: "Grok means something so fully understood that the observer becomes part of the perceived one: merging, mixing, losing your identity in a group experience. It means almost everything we mean by religion, philosophy, and science - and because we come from Earth it's just as important to us as colors for a blind person. "

In the broader sense mentioned above, the word conquered a place within the street counter in counterculture, including in hippies. In the seventies, I was Spunk under tracts a popular slogan on T-shirts and stickers, often with a picture of Mr. Spock who brings the Vulcan greeting.

Grocks are used as jargon by science fiction fans, geeks and some heathens; especially those belonging to the Church of All Worlds, but it is also endorsed and used by others. It was Douglas Engelbart's favorite verb. (in English)

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