The term "casts die" refers to making a decision or taking a course of action that cannot be changed. The opposite of this term would be to remain flexible or adaptable. Other antonyms could include: allowing for possibility, being open to options, taking an experimental approach, being tentative, and avoiding commitment. While making a decision can often help us move forward with confidence, it's important to remember that circumstances can change and sometimes, it's better to wait and see how things play out before committing ourselves to a certain course of action. Being adaptable and flexible can allow us to take advantage of new opportunities or adjust our plans as needed.