pothole

From dialectal pot (“pit, hollow, cavity”) +‎ hole. The "cave" senses, attested since at least 1809 (as pot-hole), may be from Middle English pot, potte (“a deep hole for a mine, or from peat-digging”), of uncertain origin; perhaps related to English pit, pote, or pot. Compare Scots pott, patt (“a pit dug in the ground; coalpit”).