Here's why:
* It's a root word: "Identity" is a word in its own right, meaning "the fact of being who or what a person or thing is."
* No separate parts: It doesn't have any recognizable prefixes (word parts added at the beginning) or suffixes (word parts added at the end) that change its meaning.
However, we can find related words that use prefixes and suffixes:
* Prefixes:
* Unidentified: "Un" added to "identified" to mean not known or not recognized.
* Reidentify: "Re" added to "identify" to mean identify again or identify anew.
* Suffixes:
* Identifiable: "Able" added to "identify" to mean capable of being identified.
* Identification: "ation" added to "identify" to mean the process of identifying.
So while "identity" itself doesn't have a prefix or suffix, its meaning can be modified by adding prefixes and suffixes to related words.