* A common term for "grandmother" in many languages: This includes Spanish, Italian, Portuguese, and even some dialects of English (particularly in the Caribbean).
* A specific word in a particular language: For example, in Hawaiian, "nana" means "to eat."
* A name: "Nana" can be a person's name in various cultures.
To understand the specific language origin of "nana", please provide more context.
For example:
* What is the context in which you heard "nana"?
* What language or culture are you interested in?
Once you provide more information, I can help you determine the specific origin of the word "nana".