This is one of my most favorite 'rare' adjectives.
Anfractuous is used to describe something that is full of windings and turnings.
I love this word because one of the keys is that although anfractuous plots and paths may twist and turn they do not break. The earliest uses of the word may have been about the shape of our auditory canals, but the definition has expanded in the past four hundred years to include trails, paths, shorelines, or even thought processes.
I think the idea of an anfractuous shoreline and an anfractuous train of thought have a lot of poetic potential. What anfractuosity occurs in your life?
Let me know!
-C