IPA: /ˈprɒmptnəs/
KK: /ˈprɑmptnəs/
The quality of being on time or doing something quickly without delay.
Her promptness in submitting the report impressed her boss.
Promptness → It is formed from "prompt" (from Latin "promptus", meaning ready or prepared) and the suffix "-ness" (meaning the state or quality of). The word "promptness" refers to the quality of being ready or quick to act.
Think of being 'ready' ('prompt') and the '-ness' indicating a state. This helps you remember that promptness means the quality of being ready or quick.