The word "in conclusivenesses" is a complex spelling in English, with 7 syllables and 19 letters. The IPA phonetic transcription for this word is /ɪn kən.kluː.sɪv.nɪs.ɪz/. It starts with the prefix "in-" meaning "not", followed by the root word "conclusiveness" which means an air of finality or decisiveness. The suffix "-es" indicates that it is plural. With its complicated spelling and pronunciation, the word "in conclusivenesses" may pose a challenge for non-native English speakers and even some native speakers.