tortuous

highly complex or intricate; "the Byzantine tax structure"; "convoluted legal language"; "convoluted reasoning"; "the plot was too involved"; "a knotty problem"; "got his way by labyrinthine maneuvering"; "Oh, what a tangled web we weave"- Sir Walter

हमारे घर की क्यारी में एक बहुत अजीब टेढ़ा-मेढ़ा सा पौधा उगा है जिसके बारे में किसी को भी पता नहीं है. Our kitchen garden has one mysterious, scraggly plant not known to anyone.

This is a tortuous lane.