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字源zìyuánEtymology & Structure
字源洞见 zìyuán dòngjiàn · Etymological Insight
灯 splits cleanly into two parts: 灯 = 火 + 丁. On the left sits 火 (huǒ), the fire radical, three tongues of flame compressed into four strokes; on the right sits 丁 (dīng), a blunt nail-head shape that here carries no meaning at all. 火 tells you the character is about burning light; 丁 only lends its sound. This is a textbook pictophonetic build, semantic element plus phonetic element, the most common way Chinese characters are made.
The pairing of fire and 丁 is the modern shorthand. The older, fuller form is 燈, where 火 joins 登 (dēng, to ascend, to mount). That 登 supplies the rhyme and hints at a lamp raised up on its stand to throw light across a room. When the script was simplified, the bulky 登 was swapped for the small, same-sounding 丁, and the radical migrated to the left. The flame stayed; the phonetic shrank.
The earliest 燈 named the oil dish on a pedestal, a saucer of fat with a floating wick that you literally climbed a stand to reach and trim. From that physical object the word stretched outward: to the paper lantern (灯笼), to the gas lamp, to the electric bulb (电灯), and finally to pure signal light with no flame inside it at all, like the 红灯 (hóngdēng) that halts traffic. The fire on the left is now a memory of how the light used to be made.
Japanese keeps both shapes, writing 灯 and 燈 for tō or akari, and Korean reads the same graph as deung in words for lamp and lantern. Across the region 灯 stays anchored to the same idea: a contained, deliberate flame meant to be seen.
家用jiāyòngHousehold Light
电灯diàndēngelectric light, lamp
N 名词 míngcí
电 (diàn, electric) + 灯 (lamp): the everyday electric light or bulb. The default ceiling and desk light in a modern home, as opposed to candle or oil flame.
天黑了，开电灯吧。
Tiān hēi le, kāi diàndēng ba.
It's getting dark; let's turn on the light.
台灯táidēngdesk lamp, table lamp
N 名词 míngcí
台 (tái, platform, stand) + 灯 (lamp): a lamp that sits on a desk or table, the small pool of light you read and study by.
她在台灯下看书。
Tā zài táidēng xià kàn shū.
She reads under the desk lamp.
灯笼dēnglonglantern (paper, festival)
N 名词 míngcí
灯 (lamp) + 笼 (lóng, cage, basket): a flame or bulb held inside a frame of paper or silk. The red 灯笼 hung at the New Year and the Lantern Festival is its most familiar form.
辨析 biànxī · 开灯 vs. 关灯开 opens the circuit and 关 closes it: 开灯 brings light, 关灯 takes it away. The same pair governs 电视, 空调, and most household switches.
街道jiēdàoStreet & Signal
路灯lùdēngstreet lamp
N 名词 míngcí
路 (lù, road) + 灯 (lamp): the tall lights lining a street. They come on at dusk and mark the shape of the road after dark.
路灯一亮，孩子们就该回家了。
Lùdēng yí liàng, háizimen jiù gāi huí jiā le.
Once the street lamps come on, the children should head home.
红灯hóngdēngred light (traffic)
N 名词 míngcí
红 (hóng, red) + 灯 (light): the red traffic signal that means stop. Here 灯 has shed every trace of flame and means pure colored signal. Its partner is 绿灯 (lǜdēng), the green light to go.
前面是红灯，慢一点。
Qiánmiàn shì hóngdēng, màn yìdiǎn.
There's a red light ahead; slow down.
辨析 biànxī · 红灯 vs. 绿灯 红灯 stops you and 绿灯 lets you through. 开绿灯 (kāi lǜdēng) extends figuratively to mean giving a green light, granting permission or special clearance.
交通灯jiāotōngdēngtraffic light
N 名词 míngcí
交通 (jiāotōng, traffic) + 灯 (light): the three-color signal at an intersection. Also called 红绿灯 (hónglǜdēng), literally the red-green light.
在交通灯那儿向右拐。
Zài jiāotōngdēng nàr xiàng yòu guǎi.
Turn right at the traffic light.
光色guāngsèLight Quality
灯光dēngguānglamplight, lighting
N 名词 míngcí
灯 (lamp) + 光 (guāng, light, glow): the light a lamp throws, the lighting of a room or stage. Where 灯 is the object, 灯光 is the glow itself.
餐厅的灯光很柔和。
Cāntīng de dēngguāng hěn róuhé.
The lighting in the restaurant is very soft.
辨析 biànxī · 灯 vs. 灯光 灯 is the lamp you can switch and carry; 灯光 is the radiance it gives off. You turn on a 灯, but you sit in 灯光.
日光灯rìguāngdēngfluorescent light
N 名词 míngcí
日光 (rìguāng, sunlight, daylight) + 灯 (lamp): a fluorescent tube, named for the cool daylight-white glow it gives. The long white strip light common in offices and kitchens.
办公室里装的是日光灯。
Bàngōngshì lǐ zhuāng de shì rìguāngdēng.
The office is fitted with fluorescent lights.
灯火dēnghuǒlights (of a place at night)
N 名词 míngcí
灯 (lamp) + 火 (huǒ, fire): the massed lights of a town or harbor seen at night, often in the literary phrase 灯火通明 (dēnghuǒ tōngmíng), brilliantly lit.
山下的城市灯火通明。
Shān xià de chéngshì dēnghuǒ tōngmíng.
The city below the mountain blazes with light.
成语chéngyǔIdioms & Set Phrases
张灯结彩zhāng dēng jié cǎihang lanterns and tie silks: decorate for celebrationThe image of a courtyard strung with lanterns and colored cloth for a wedding or festival. Still the standard phrase for festive decoration, neutral to warm in register.
灯火通明dēng huǒ tōng mínglamps lit all through: every light blazingA house, street, or ship lit up from end to end, not one window dark. Plainer than 灯火辉煌: it stresses that everything is lit rather than that the light is splendid.
灯红酒绿dēng hóng jiǔ lǜred lamps and green wine: gaudy nightlifeThe glow of pleasure quarters, often tinged with disapproval. Describes a city of bars and neon, sometimes implying decadence or excess.
灯火辉煌dēng huǒ huī huánglamps blazing splendidly: brilliantly litA hall or street ablaze with light, suggesting wealth, festivity, or grandeur. A common way to paint a banquet or a lit skyline.
记忆法 jìyìfǎ · Master Retention Image
Picture an old oil lamp on a wooden stand: a shallow dish of fat, a wick floating in it, and one steady flame leaning in the draft. That flame is 火, the fire radical clinging to the left side of 灯. Reach over and tap the iron nail-head holding the stand together, a small blunt 丁: it makes a clear ringing dēng. Fire on the left, the dēng-sound on the right, and the lamp is built.
Now follow that single flame as it changes costume. Drop it into a paper cage and it becomes a 灯笼 swaying at the New Year. Run a wire to it and the flame turns into a glowing 电灯 bulb. Raise it on a pole over the road and it is a 路灯. Strip away the fire entirely and leave only its color, and you have the 红灯 that stops your car at the crossing.
Every one of those words keeps the same nail tapping out dēng on the right, while the left-hand fire quietly remembers that all of this light, even the cold red signal at the intersection, began as one wick burning in a dish.
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