The word "Pollenarious" is spelled with a double "n" in the middle, which is represented in IPA as /n/ and /n/, indicating two separate nasal consonant sounds. The "o" in the first syllable is pronounced as /ɒ/, and the stress falls on the second syllable, which has the long "a" sound /ɛə/. The final syllable is pronounced as /iəs/, representing the sound of the letters "us" when pronounced as two separate vowel sounds. Thus, the correct IPA transcription for "Pollenarious" is /pɒləˈnɛərɪəs/.
Consisting of pollen or meal.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.