'neg-if-i-kayt - verb; to make a situation or state of being the opposite of what it is. Similar to negify. Not a word with negative connotations, a neutral word meaning to change to an opposite state.
Jerry wanted to negaficate the fact that his bills were overdue.
To get the logarithm of a fraction, cover up the numerator with your magic finger, find the logarithm of the denominator, and negaficate it.