The spelling of the word "flashinesses" is complicated due to the presence of multiple consonants together. The word is spelled as /ˈflæʃiniːsɪz/. The double "s" is added to indicate the plural form of the noun. The suffix "-ness" is added to the word "flashy" to form the noun "flashiness". The plural suffix "-es" is added to the end of "flashiness" to indicate multiple occurrences. Therefore, "flashinesses" refers to multiple instances of being overly showy or garish.