What does the latin word cur mean?

The Latin word "cur" doesn't exist on its own. It's likely you're thinking of one of these:

* "Cur" as part of a larger word: This could be part of a Latin word like "currus" (meaning "chariot") or "curva" (meaning "curve").

* "Cur" as an abbreviation: This might be a shorthand for "currit" (meaning "he/she/it runs").

Please provide more context if you can remember the full word or phrase.