The antonyms for the word "unwrittenness" are numerous, as there are many words that describe things that have been written down. Some possible antonyms could be "writtenness," "recorded," "documented," "published," "printed," or "chronicled." Each of these words implies that something has been written or recorded in some way, and therefore has a tangible form that can be referenced, shared, and preserved. In contrast, "unwrittenness" implies a lack of clarity, certainty, or formality, as it suggests that something is either uncertain, unofficial, or not yet put into writing. By using antonyms to such abstract concepts, we can better understand the nuances of language and the various ways in which we express ourselves.