坑洞 Traditional form: 坑洞 Pinyin (reading): kēngdòng Definitions: hole pit pothole Characters: 坑 - pit, hole; to trap, to bury; to harry 洞 - cave, grotto, hole, ravine Traditional characters: 坑 - pit, hole; to trap, to bury; to harry 洞 - cave, grotto, hole, ravine