Predetermination is the act of deciding something in advance or setting a course of action before the event takes place. Antonyms for predeterminations include unpredictability, spontaneity, chance, contingency, and serendipity. Unpredictability refers to a state of being unable to predict what will happen next, while spontaneity is the quality of being unplanned and natural. Chance represents a situation in which events happen without any apparent cause or design. Contingency means that something may or may not happen depending on circumstances, and serendipity suggests unexpected, fortunate discoveries made by chance. Each of these antonyms for predetermination highlights the idea of the unknown and uncontrolled elements of life.