IPA: /ʌnˈsɛksiər/
KK: /ʌnˈsɛksiər/
Less attractive or appealing in a sexual way compared to something else.
The new design is unsexier than the previous version.
Comparative: unsexier
Superlative: unsexiest
Unsexier → It is formed from "un-" (meaning not) and "sexy" (from Latin *sexus*, meaning sex or gender, combined with the modern English suffix "-y" which denotes a quality). The word "unsexier" means not possessing the quality of being sexy or less sexy than something else.
Think of 'not' ('un-') and 'sexy' to remember that 'unsexier' means lacking the quality of being sexy.
No commonly confused words.