The spelling of the word "in curiousnesses" can be confusing due to the various vowel sounds and the double consonants. IPA phonetic transcription reveals that it is pronounced as /ɪn kjuːriəsnɛsɪz/. The word starts with the short "i" sound followed by "kyoo-ree". The word ends with a cluster of consonants such as "n", "s" and "z" which might be challenging to articulate. In conclusion, being mindful of the IPA phonetic transcription can help individuals spell and pronounce words correctly.