IPA: /prəˈpraɪəti/
KK: /prəˈpraɪəti/
The quality of behaving in a way that is socially acceptable and proper according to the customs of a society.
She always showed great propriety in her behavior at formal events.
Propriety → It is formed from "proprius" (meaning one's own or proper) and the suffix "-ty" (indicating a state or quality). The word "propriety" refers to the state of being proper or appropriate in behavior or manners.
Think of 'proper' ('proprius') to remember that 'propriety' means the quality of being proper or appropriate.