IPA: /ˌprɛdʒʊˈdʒɪləsnəs/
KK: /prɛdʒʊˈdʒɪləsnəs/
The condition of causing harm or damage, often due to bias or unfair treatment.
The prejudicialness of the policy led to widespread criticism from various groups.
Prejudicialness → It is formed from "pre-" (meaning before), "judicium" (from Latin, meaning judgment), and "-ness" (meaning the state of being). The word refers to the state of causing harm or damage before a fair judgment is made.
Think of 'before' ('pre-') a 'judgment' ('judicium') is made, which helps you remember that 'prejudicialness' means the state of causing harm before a fair decision.