propria

The word propria comes from the Latin proprius, meaning "one's own" or "belonging to oneself." In English, it is a rare word, and its most important use is as the plural of proprium. In psychology, especially in the work of Gordon Allport, the propria are the aspects of the self that a person feels as truly their own. These include personal memories, feelings, goals, values, and other inner features that build a sense of identity over time.

This means the word is less about ownership in a simple, physical sense and more about the personal core of someone’s life. It names the parts of experience that feel central to who a person is. In that setting, propria helps describe how personality is lived and understood from the inside.

Outside psychology, the word may also appear in Latin, philosophy, theology, or other formal writing to suggest properties that are proper to a thing or belong especially to it. Even there, it remains uncommon in modern everyday English. You would usually not use propria in casual conversation. Instead, it belongs to careful, specialized writing where the writer wants to speak about what is distinctly one’s own or about the defining features of the self.