IPA: //ʌnˈprɪti//
KK: /ʌnˈprɪti/
Not attractive or pleasing in appearance.
She felt unpretty compared to her friends at the party.
Unpretty → It is formed from "un-" (meaning not) and "pretty" (from Old English *prættig*, meaning attractive or pleasing). The word "unpretty" means not attractive or lacking in beauty.
Think of 'not' ('un-') combined with 'attractive' ('pretty') to remember that 'unpretty' means lacking in beauty.