IPA: //pʌŋkˈtɪlioʊ//
KK: /pʌŋkˈtɪlioʊ/
A small detail or rule about how to behave in a formal situation.
He followed every punctilio during the ceremony to ensure everything was perfect.
Punctilio → It is formed from "punctum" (meaning point) and the diminutive suffix "-ilio" (indicating smallness or a lesser degree). The word refers to a small point of detail or a fine point in conduct or procedure.
Think of a 'point' ('punctum') that is very small or specific ('-ilio'), which helps you remember that punctilio refers to a fine point of detail.