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