The spelling of the word "at onenesses" may seem confusing at first glance, but it's actually quite simple when broken down phonetically. The "a" sound is pronounced as /æ/, followed by the short "o" sound pronounced as /ɑ/. The next syllable "ness" is pronounced as /nəs/. Finally, the last syllable "es" is pronounced as /ɪz/. Therefore, the phonetic pronunciation of "at onenesses" is /æt ˈoʊnəsnəz/. This word refers to the state of being at one or in harmony with oneself and the universe.