IPA: //ʌnˈlʌvli.nəs//
KK: /ʌnˈlʌvliːnəs/
The state of being unattractive or not pleasing in appearance.
The unloveliness of the old building made it hard to sell.
Unloveliness → It is formed from "un-" (meaning not) and "loveliness" (from "love" (from Old English *lufu*, meaning deep affection) and the suffix "-ness" (meaning the state of being). The word "unloveliness" means the state of not being lovely or lacking beauty and affection.
Think of 'not' ('un-') being combined with 'loveliness' to remember that 'unloveliness' refers to the state of lacking beauty or affection.