zigzag

siksak, siksakki

siksakkia

pujotella a line or path that proceeds by sharp turns in alternate alternating directions
one of such sharp turns
Moving in, or having a zigzag.
1820, (w), (w), Chapter 16,http://www.gutenberg.org/files/82/82-h/82-h.htm

The entrance to this ancient place of devotion was under a very low round arch, ornamented by several courses of that zig-zag moulding, resembling shark’s teeth, which appears so often in the more ancient Saxon architecture.

(...) between two spears of rock, directly in line with his position, showed a zigzag crack that at night would let through the gleam of sky.

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.