How to say "Grok" :  Pronunciation
Channel: Pronounce English [Moribund Institute]
Date: 2022-10-30

Verb

Grok
1. (transitive, slang) To understand (something) intuitively, to know (something) without having to think intellectually.
2. (transitive, slang) To fully and completely understand something in all of its details and intricacies.

    I finally grok Perl.
    I find it exceedingly doubtful that any person groks quantum mechanics.

Etymology - Coined by American author and aeronautical engineer Robert A. Heinlein in 1961 in his novel Stranger in a Strange Land. The word is described as being from the word for “to drink” and, figuratively, “to drink in all available aspects of reality”, “to become one with the observed” in Heinlein’s fictitious Martian language. William Tenn later asked Heinlein if it could have been inspired by the term griggo, which featured in Tenn's 1949 Venus and the Seven Sexes; Heinlein “looked startled, then thought about it for a long time (and) shrugged, (saying) ‘It's possible, very possible.’”

Usage notes - Grok is used mainly by the geek subculture, though it was heavily used by the counterculture of the 1960s, as evidenced by its repeated appearance in Tom Wolfe's “The Electric Kool-Aid Acid Test.” 

https://en.wiktionary.org/wiki/grok