The word "more timeous" essentially means that something is happening at a timely manner or is done promptly. Therefore, the antonyms for this term would imply the opposite. Some of the antonyms for "more timeous" include slow, tardy, delayed, late, overdue, unpunctual, and procrastinating. When something is slow, it means it's taking a long time to finish or complete, whereas tardy signifies that something is not being done on time. Delayed and late mean things are not happening according to schedule or are happening long after their expected time. Overdue points to the fact that something has not been completed even though it was supposed to be finished. Lastly, unpunctual and procrastinating show that something is not being done on time or as it should be.