The antonyms for the term "most splendent" would be dull, bleak, drab, lackluster, dreary, and lifeless. These terms signify the absence of brightness, vivacity, and radiance. A lack of splendor might connote monotony, dreariness, or an absence of liveliness. An unremarkable or austere environment can also be expressed by these terms. In contrast, splendor refers to something that is vibrant, vivid, and resplendent. Therefore, the use of antonyms like dull, drab or lacklustre might suggest that something is ordinary, uninteresting or subdued while most splendent would indicate grandeur, magnificence, and grandness.