The term "wanna-be" is a modern colloquial compound formed within English itself. It directly combines the casual spoken contraction "wanna" (from "want to") with the infinitive "be". The logic is transparent and literal: a person who "wants to be" something or someone else. Emerging in American slang in the late 20th century, it captures the aspirational yet often inauthentic or unsuccessful imitation of a role model, celebrity, or member of a desired social group. Its formation follows a productive pattern in English for creating descriptive nouns from verb phrases, similar to "has-been" or "go-getter".

Structure: wanna (want to) + be wanna: A contraction of "want to", originating from informal American English (20th century). It functions as a verbal phrase indicating desire. be: From Old English 'bēon', meaning "to exist, to occur". It functions as the infinitive of the verb 'to be'.