U+5811 "堑" CJK Unified Ideograph-# Unicode Character

U+5811 "堑" CJK Unified Ideograph-# is a Chinese character that primarily means "moat" or "pit" and often refers to a defensive trench, ditch, or depression in the ground used for military fortifications or as a barrier. In modern usage, it can also signify a setback or a period of difficulty in a person's career or life, as seen in the Chinese idiom 吃一堑，长一智 meaning "a fall into a pit, a gain in your wit." The character is composed of the radical 土 for earth or ground and the phonetic component 欠, and it is commonly found in historical texts and contemporary discussions related to engineering, geography, and figurative language about obstacles.