Predetermine is a word that indicates an action of establishing or deciding something in advance. Its antonyms are words that convey the opposite meaning, such as free, uncommitted, spontaneous, uncertain, and undecided. Free implies the absence of restrictions or limitations, uncommitted represents not being bound to a particular course of action, while spontaneous refers to an action that occurs naturally or without planning. Uncertain means having no clear direction or outcome, and undecided portrays a state of being indecisive or unresolved. These antonyms for predetermine are useful for expressing a range of different ideas and concepts, depending on the context in which they are used.