The term "all-comprehending" is used to describe something that has the ability to understand or comprehend everything. Some synonyms for this term include all-inclusive, all-embracing, and all-encompassing. These words convey the idea of something that encompasses all aspects and factors, leaving nothing out. Other possible synonyms include omniscient, exhaustive, and encyclopedic. Each of these words has slightly different connotations, but all convey the idea of a thorough understanding and knowledge of everything. Whether describing a person, idea, or system, the use of any of these words can help convey the concept of complete comprehension.