The word apriority refers to a concept or idea that is considered to be inherently true without the need for further explanation or justification. A possible antonym for apriority could be contingency, which means that something is subject to certain conditions or circumstances and is not necessarily true in all cases. Another antonym could be uncertainty, indicating a lack of knowledge or understanding about a particular concept or idea. Alternatively, empirical or evidence-based could be used as antonyms for apriority, suggesting that a concept or statement is grounded in observable data or experience rather than purely abstract reasoning.