All 4 Uses

comprehend
in
A Man Named Dave
(Auto-generated)

It took me more than half a dozen tries to comprehend the contents of the letter.†
p. 55.1 *

comprehend = understand -- especially to understand it completely
It took me a few seconds to comprehend what Mother was saying.†
p. 87.5
I had never taken anything beyond basic math while in high school before I dropped out, so fundamental algebra was way beyond my comprehension.†
p. 128.1

comprehension = the understanding of something
There's a limit to his understanding, his comprehension.†
p. 140.3

Definitions:

(1) (comprehend)
to understand something -- especially to understand it completely
(2) (meaning too rare to warrant focus)
Much more rarely (and more frequently in the past), comprehend can mean to include as part of something broader. That was the first sense of the word listed in Webster's Dictionary of 1828 with this sample sentence: "The empire of Great Britain comprehends England, Scotland and Ireland, with their dependencies."