The phrase "one discretion" refers to the power or authority to make a decision based on one's judgment or personal preference. Antonyms for this phrase would include terms such as "mandated", "non-negotiable", "prescribed", and "regulated". These words imply that a decision must be made based on external guidelines or regulations, rather than one's own individual judgment. Other antonyms might include terms such as "compelled", "required", "obligated", or "bound", which suggest that one's decision-making ability is constrained by external factors. Ultimately, the antonyms for "one discretion" imply a loss of personal agency or autonomy in decision-making, highlighting the importance of strategic language use in conveying meaning.