Being contingent implies that something is dependent on something else for its existence or occurrence. The antonym of being contingent is being independent, meaning that something occurs or exists without being influenced or affected by something else. Independence represents a state of self-reliance and autonomy, where one is not subject to external factors or forces. Another antonym for being contingent is being certain or definite, indicating a situation where the outcome or occurrence is sure and not dependent on any external factors. Being deterministic or predetermined functions as antonyms for being contingent since they signify the lack of dependency on external factors or conditions.