The spelling of the word "un sex" can be confusing, as it may appear incorrect due to its resemblance to the root word "unsex" which means to deprive of sexual characteristics. However, "un sex" is a valid spelling, used to describe a lack of sexual activity or desire. Its pronunciation is /ʌn sɛks/, making use of the unstressed schwa sound in the first syllable and a clear "s" sound in the second syllable.