丹 🔊

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核心含义与象形起源： “丹”最初的字形像一个井口，中间的一点表示从井中采出的赤色矿石（朱砂）。本义是“朱砂”，即一种鲜红色的矿物，后来也泛指红色。Core meaning & pictographic origin: The character “丹” depicts a mining well with a red mineral (cinnabar) inside. Its original meaning is “cinnabar” (a bright red mineral), and it later extended to mean “red color” in general.

有趣的文化背景： “丹”在古代常与丹砂（cinnabar）有关，道家用其炼制丹药。此外，丹常用来比喻忠诚、赤诚等美德。Cultural background: “丹” is associated with cinnabar in ancient times, which Taoists used to make elixirs. It also metaphorically represents loyalty and sincerity.

• 常用词语：丹青（绘画或画作）、丹砂（朱砂）、丹心（忠诚之心）。Common words: 丹青 (painting/artwork), 丹砂 (cinnabar), 丹心 (a loyal and sincere heart).
• 成语引用：如《吕氏春秋》有言：“丹可磨也，而不可夺赤。”表示本性难移，体现赤诚。Idioms/quotes: In works such as “Lüshi Chunqiu”: “丹可磨也，而不可夺赤” (“Cinnabar may be ground, but its redness cannot be taken away.”), meaning genuine character does not change.
• 易混淆点：“丹”常用作偏旁，相关字多与红色或矿石有关。需注意与“朱”、“赤”等同类表达的区别。Easily confused points: "丹" is often used as a radical in characters related to red color or minerals. Distinguish it from similar words like “朱” (vermilion) and “赤” (another word for red).

总结： “丹”的本义为朱砂，象形代表采矿的井和矿石，引申为红色，并赋予忠诚、真挚等意义。常见于词语和成语，文化背景丰富。Summary: "丹" originally means cinnabar, pictographically showing a mining well and mineral. It extends to mean red, sincerity, and loyalty, and is widely used in words and idioms with rich cultural connotations.