The term "disadvise" is not commonly used in common English usage, therefore, there may not be a language-based antonym. However, if we consider the meaning of "disadvise" as the opposite of "advise," the antonyms can be considered as 'advocate,' 'approve,' or 'endorse.' These terms imply that someone has provided positive feedback or endorsed a particular action. The antonyms for "disadvise" would be words that indicate support or agreement with a particular course of action. These antonyms could vary depending on the context of the situation, and the most appropriate one will depend on the specific situation it is used.