Some words are not designed to be negated. Or positivified. (Nor are words like positivified supposed to be made up, I suspect). It is my understanding that the great PG Wodehouse invented the word 'couth' as the opposite of 'uncouth', a word which had never had its positive connotation used before. Such are the wonders of the English language.
Anyway, here is a poem where all the uns and dis's and ins and the like have been removed: enjoy!