IPA: //pʌŋkˈtɪl.i.əs.nəs//
KK: /pʌŋkˈtɪlɪəsnəs/
The quality of being very careful about details and rules.
Her punctiliousness in following the instructions impressed everyone at the meeting.
Punctiliousness → It is formed from "punctilious" (from Latin "punctiliosus", meaning careful or precise) and the suffix "-ness" (meaning the state or quality of). The word "punctiliousness" refers to the quality of being very careful about details and proper behavior.
Think of being very 'careful' ('punctilious') about details, and the '-ness' shows it's a quality. This helps you remember that punctiliousness means the quality of being meticulous.