打洞 Traditional form: 打洞 Pinyin (reading): dǎdòng Definitions: to punch a hole to drill a hole to dig a hole to burrow Characters: 打 - to attack, to beat, to hit, to strike 洞 - cave, grotto, hole, ravine Traditional characters: 打 - to attack, to beat, to hit, to strike 洞 - cave, grotto, hole, ravine