The word "Illustratory" is an adjective that refers to something that is explanatory or descriptive. Its antonyms are the words that denote the opposite meaning such as vague, inexplicit, ambiguous, obscure, cryptic, and enigmatic. While illustratory words clarify and illuminate meaning, their antonyms are associated with unclear and uncertain explanations. For instance, instead of using the illustratory word, you can use obscure words to make sentences more challenging for the reader. It's important to consider the context when choosing antonyms for illustratory because using them inappropriately may result in confusion or misinterpretation of your intended meaning.