窿mine shaft; cavity, hole; cavity; holeStrokes16PinyinlóngParts穴cave, den, hole隆prosperous, plentiful, abundantWords with 窿穹窿qióng lóng · qionglonga dome; a vault; the sky窟窿kū long · kulonghole; pocket; cavity大耳窿dà ěr lóng · daerlongloan shark; usurer窟窿眼kū long yǎn · kulongyansmall holeStudy it in Yanamino