The antonyms for "un-comprehending" are varied and include terms that describe individuals who are knowledgeable, understanding or perceptive. Synonyms for the word "comprehend" include "understand", "grasp" and "get." Antonyms for the word may include "ignorant", "clueless", "unlearned" or "unschooled." Other antonyms for "un-comprehending" could be "intuitive," "astute," "aware" and "informed". These terms indicate that the individual possesses a high level of intelligence, perception and insight into the world around them. As such, they are better equipped to make well-informed decisions, and communicate their ideas effectively.