Prevenience refers to the quality of being earlier or more prior in time, order, or importance. However, its antonyms can be identified as words that indicate lateness or being later than another or a lower level of priority. Antonyms of prevenience can be tardiness, neglect, or afterthought. Tardiness refers to being late or delaying beyond the expected time, thus the opposite of prevenience. Neglect, on the other hand, means to pay less attention or to be careless, the opposite of the importance that prevenience connotes. Lastly, afterthought denotes an idea that occurs later after one has prepared or planned, as opposed to prevenient, which refers to something pre-planned or pre-organized.