The phrase "most circumambient" means the most surrounding or encompassing. Some synonyms for this phrase include all-encompassing, pervasive, ubiquitous, omnipresent, and all-pervading. These words describe something that is widespread and has a significant impact on its surroundings. Another synonym is ubiquitous, which means something that is present everywhere at the same time. All-pervading is another word that describes something that is present and can be felt everywhere. Synonyms for most circumambient are useful when a writer wants to highlight the extent to which something affects and is present in its environment.