Acnestos is a word that is not commonly used in English. The correct spelling of this word is /æk 'nɛs tɒs/, with four syllables. The first syllable has a short "a" sound, followed by a "k" sound. The second syllable has a schwa sound for the vowel, followed by a short "e" sound. The third syllable has a stressed "s" sound, followed by a "t" sound, and the final syllable has a short "o" sound, followed by an "s" sound. Its definition refers to something that cannot be easily removed or eradicated.