IPA: /ɪmˈprɛsɪvnəs/
KK: /ɪmˈprɛsɪvnəs/
The quality of making a strong impact or leaving a lasting effect on someone.
The impressiveness of the performance left the audience in awe.
Impressiveness is formed from "impress" (from Latin "imprimere", meaning to press into or upon) and the suffix "-ness" (meaning the state or quality of). The word refers to the quality of being impressive or making a strong impact.
Think of the act of 'pressing' something into a surface ('impress') and then consider that '-ness' indicates a state. This helps you remember that 'impressiveness' refers to the quality of making a strong impression.