WordNet sense 1 (marked by repeated turns and bends):

twisty, voluminous, winding, twisting

WordNet sense 2 (having or marked by bends or angles; not straight or aligned):

crooked, crooked

WordNet sense 3 (highly complex or intricate):

byzantine, convoluted, involved, knotty, tangled

WordNet sense 4 (complicated in structure; consisting of interconnected parts):

complex, complex

WordNet sense 5 (extended senses; not direct in manner or language or behavior or action):

indirect