## Meanings
1. Who a person is; the qualities that make someone or something distinct.
2. The fact of who exactly someone is, often kept secret or needing proof.
3. An equation that is always true whatever values you put in.

## Examples
- After moving abroad, he struggled to keep his sense of identity.
- The police would not reveal the identity of the witness.
- The formula (x+y)(x−y) = x²−y² is an algebraic identity.

## Derived Forms
- bioidentity
- coidentity
- cyberidentity
- e-identity
- identicard
- identicide
- identicon
- identitarian
- identityless
- misidentity
- nonidentity
- self-identity

## Related Forms
- identic
- identical
- identification
- identify

## Roots and Affixes
- Root: ydemptite
- Root: identité
- Root: ταὐτότης

## Etymology
From Middle English ydemptite, from Middle French identité and its etymon Late Latin idemptitās, identitās, from idem (“the same”) + -tās (suffix forming abstract nouns) as a calque of Ancient Greek ταὐτότης (tautótēs, “sameness”).

## AI Etymology
Identity comes from Middle English ydemptite, from Middle French identité and its etymon Late Latin idemptitās, identitās, from idem (“the same”) + -tās (suffix forming abstract nouns) as a calque of Ancient Greek ταὐτότης (tautótēs, “sameness”). The analysis is mainly morphological: the modern nominal form is built from the named base and affix. In current use, the main senses are “Who a person is; the qualities that make someone or something distinct” and “The fact of who exactly someone is, often kept secret or needing proof”.

## Topics
- People & Society

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