comprehend

Etymology

From Middle English comprehenden, from Latin comprehendere (“to grasp”), from the prefix com- + prehendere (“to seize”).

verb

1. (now rare) To include, comprise; to contain.
   In the second century of the Christian Æra, the empire of Rome comprehended the fairest part of the earth, and the most civilized portion of mankind. 1776, Edward Gibbon, The History of the Decline and Fall of the Roman Empire, Penguin, published 2009, page 9
2. To understand or grasp fully and thoroughly.