* A misspelling: Perhaps it's a typo for "night" or a variation of "midnight."
* A regional slang term: Some words are used in specific areas or communities and may not be widely recognized.
* A made-up word: It could be a creative invention for a specific purpose, like a fictional story or a brand name.
To find out the origin of "nanight," you would need more context.
For example:
* Where did you encounter this term? (A book, online, in conversation)
* What was the context? (What was being discussed or written about?)
Providing this information will help determine if "nanight" has a specific meaning or if it's simply a mistake.