identity

This term describes the internal and external markers that define a unique entity. It often carries a psychological or sociological weight, referring to the conscious sense of self and the labels one adopts to find a place within a social structure.

In technical or legal contexts, the word shifts toward verification and authentication. It becomes a matter of evidence—passports, fingerprints, or digital IDs—where the focus is on proving that a person is exactly who they claim to be.