IPA: /dɪsˈpɜːrsɪvnəs/
KK: /dɪsˈpɜrsɪvnɪs/
The quality or state of spreading out or scattering in different directions.
The dispersiveness of the gas allowed it to fill the entire room quickly.
Dispersiveness is formed from "dis-" (meaning apart) and "persus" (from Latin "spargere", meaning to scatter). The word describes the quality of being able to scatter or spread apart.
Think of 'scattering apart' — 'dis-' means apart, and 'spargere' means to scatter. This helps you remember that dispersiveness refers to the quality of spreading out.