grok

verb2

1. •
   (slang) To understand (something) intuitively, to know (something) without having to think intellectually.

   • In his movie—right right right—and they all grok over that. Grok―and then it's clear, without anybody having to say it. — 1968
2. •
   (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.