Noselectionitionialistly started out as a much shorter and much better word. The original word has now been forgotten, but it was such a good word that people used it excessively, like cool, should of or snack cracker.
Over time, it dawned on folks that if the short word was good, it would be better if it were longer. Thus, the word was improved by giving it more syllables and less meaning.
Only true Noselectionitionialists like Eli Whitney and James Spader used the noun and verb forms of the word, but the adverb form noselectionitionialistly continued to stumble along in common usage among pretentionalists and no accounts.
The word finally lost all appeal when people's moms started using it in public.