"Grunginesses" is a plural form of "grunginess", a noun that describes something dirty, shabby or grimy. The spelling of this word follows the rules of English morphology, where the suffix "-ness" is added to the base word "grungy" to create a noun. The pronunciation of "grunginesses" can be transcribed as /ˈɡrʌndʒinəsɪz/, where stress is on the second syllable and the final "-es" is pronounced as /ɪz/ due to the voicing of the preceding consonant.