adjective
Plots and paths can be anfractuous. They twist and turn but do not break. –Merriam-Webster website
This one’s I think is for describing both paths a group must take, and their winding confusing pattern as the webster example, and art, script or symbols. While some dictionaries and websites use convoluted as a synonym, I think it’s better used to point out that something doesn’t break, rather than the confusion it presents. It does both quite well, so do what you will with it.