What does unjulate mean?

"Unjulate" is not a standard English word. It's likely a misspelling of undulate, which means:

* To move in a wavelike motion: The flag undulated in the breeze.

* To have a wavy or undulating surface: The landscape was undulated with hills and valleys.

If you meant to use a different word, please provide more context, and I can help you find the correct term.