Expectedness is a term that refers to something being predictable, anticipated or foreseen. However, there are multiple antonyms for this word that can convey different meanings. For instance, unpredictability is a word that expresses the opposite of expectedness, meaning something that cannot be foreseen. Uncertainty, variability, and randomness are other antonyms of expectedness, which are used to describe situations that are unstable, unpredictable, or changing. Another antonym is unfamiliarity, used to describe circumstances that are unknown, strange, or not well understood. In conclusion, expectedness has many antonyms that capture the essence of what cannot be predicted, understood, or known.