Antonyms for the word "more adumbrated" include "clearer," "explicit," "distinct," "obvious," "unambiguous," and "unmistakable." These words convey the opposite meaning of adumbrated, which means obscure or vaguely outlined. Using these antonyms, we can create sentences that communicate a clearer and more precise message. For instance, instead of saying, "The proposal was more adumbrated," we can say, "The proposal was clearer and more distinct." Choosing the right antonym enhances the quality of communication and enables the audience to grasp the intended meaning of the message without confusion.