天塌地陷 tiāntādìxiàn terrible calamity Origin Definitions Defs Strokes Stroke Words Sentences Sents 天 tiān noun sky sky; heavens; the space above the earth塌 tā verb to collapse to collapse; to cave in; to fall down地 dì noun earth The earth; the ground; land; soil; fields陷 xiàn verb to sink to fall into; to get stuck or bogged down in mud or sand; to cave in or become sunken