zigzag

At the base this vent was dark, cool, and smelled of dry, musty dust. It zigzagged so that he could not see ahead more than a few yards at a time.

[…] she saw them as we see the throngs which cover the canvases of Sallaert, Van Alsloot, and others of that school—vast masses of beings, jostling, zigzagging, and processioning i…