The word "de spitefulnesses" is not a commonly used word in the English language, and it is difficult to find antonyms for it. However, breaking the word down, "spitefulness" means maliciousness or malevolence, so antonyms for that could include benevolence, kindness, or goodwill. Adding the prefix "de-" which usually means "opposite of" or "reversal of" could suggest that the word means "lack of spitefulness." In this case, antonyms could be spitelessness, friendliness, or congeniality. Despite the lack of common usage of the word, understanding its meaning can provide a way to broaden and enhance our vocabulary.