Read Edit View history 天堑 tiānqiàn natural moat Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 天堑/天塹 · tiānqiàn · natural moat 2026/03/04 天堑 / 天塹 tiānqiàn natural moat natural moat 长江自古以来就是一道天堑。 noun created sense Mar 4, 2026, 02:25 AM