Depression in the Ground Where Water Accumulates

This page is the CodyCross answer for the clue below from Wild West, Group 438, Puzzle 1 (Wild Bill Hickok).

Question is: Depression in the Ground Where Water Accumulates

and the answer is: SINKHOLE

Word Meaning:

SINKHOLE — (geology) A hole formed in soluble rock by the action of water, serving to conduct surface water to an underground passage.

Definitions from Wiktionary.