PROPRIETY equals to ‘Propr-iety’, that would make it sound like proper which is close to what propriety means. It refers to the correctness, the properness in something. The whole idea is to think of the word proper whenever propriety is mentioned and infer the meaning as given in the context accordingly.
It is as simple as that!
Meaning of Propriety:
1. conformity to established standards of good or properbehavior or manners.
2. rightness or justness.
Sentence Examples for Propriety:
1. Many a time the propriety of his actions has been questioned by the society but for him, the societal standards hold no value.