"Nonnullification" is a misspelled word as there are two consecutive "n" letters. The correct spelling is "non-nullification" and is pronounced as /nɒnˌnʌlɪfɪˈkeɪʃən/. The prefix "non-" means "not," and "nullification" refers to the act of making something invalid or void. Together, "non-nullification" means that something is not being made invalid or void. This word may be useful in legal or political contexts where the concept of nullification is discussed but the opposite is desired.