IPA: //ʌnˈprɛdʒədɪst//
KK: /ʌnˈprɛdʒədɪst/
Not having any bias or unfair opinions; treating everyone equally and fairly.
The judge was unprejudiced in her decision, ensuring that all evidence was considered equally.
Unprejudiced → It is formed from "un-" (meaning not) and "prejudice" (from Latin "praejudicium", meaning a judgment made beforehand). The word "unprejudiced" means not having a judgment made beforehand, implying fairness and impartiality.
Think of 'not' ('un-') having a 'judgment made beforehand' ('prejudice') — that's why unprejudiced means being fair and open-minded.