Grok

[from the novel 'Stranger in a Strange Land', by Robert A. Heinlein, where it is a Martian word meaning literally 'to drink' and metaphorically 'to be one with']

vt. 1. To understand, usually in a global sense. Connotes intimate and exhaustive knowledge. Contrast zen, similar supernal understanding as a single brief flash.

See also glark.

2. Used of programs, may connote merely sufficient understanding.

"Almost all C compilers grok the 'void' type these days."