IPA: /dɪsˈpɛrət.nəs/
KK: /dɪsˈpɛrətnəs/
The quality or state of being different or distinct from one another.
The disparateness of their opinions made it difficult to reach a consensus.
Disparateness → It is formed from "dis-" (meaning apart) and "par" (from Latin "paris", meaning equal) with the suffix "-ness" (meaning the state of). The word refers to the state of being unequal or different from one another.
Think of being 'apart' ('dis-') and 'not equal' ('par') — that's why disparateness means the state of being different.