The spelling of the word "un sexes" may seem peculiar, but it is actually a combination of two words with opposite meanings: "un" meaning "not" and "sexes" meaning "biological sexes." The IPA phonetic transcription for this word would be /ʌn ˈsɛksɪz/. This spelling highlights the importance of understanding the root words in order to decipher the meaning of a compound word. In this case, "un sexes" refers to the absence of biological sexes in a particular context.