Understanding "信号" - Chinese Word Explanation

1. Basic Information

• Word: 信号
• Pinyin: xìn hào
• Literal Meaning: "message" (信) + "sign" (号)
• Primary Meaning: "signal" (a detectable physical quantity or impulse used to transmit information, such as light, sound, or electronic waves).

2. In-depth Explanation

Context and Usage

"信号" is a versatile term used in both technical and everyday contexts. It refers to any form of signal, including:
- Technology: Wi-Fi signals, radio signals, traffic signals.
- Communication: Phone signals, nonverbal cues (e.g., "His smile was a signal of approval").
- Nature: Biological signals (e.g., "The plant responds to light signals").

Nuances:
- Unlike the English "signal," which can also mean "to indicate" (e.g., "She signaled to leave"), "信号" in Chinese is strictly a noun.

Character Breakdown

• 信 (xìn): Means "message," "trust," or "letter."
• 号 (hào): Means "sign," "number," or "mark." Together, they emphasize the idea of a "communicative sign."

3. Example Sentences

1. Chinese: 我的手机没有信号。
   Pinyin: Wǒ de shǒujī méiyǒu xìnhào.
   English: My phone has no signal.

2. Chinese: 交通信号灯变红了。
   Pinyin: Jiāotōng xìnhào dēng biàn hóng le.
   English: The traffic signal light turned red.

3. Chinese: 这是危险的信号。
   Pinyin: Zhè shì wēixiǎn de xìnhào.
   English: This is a danger signal.

Cultural Notes

• In China, "信号" is often discussed in the context of rapid technological development, such as 5G signals (5G信号).
• The phrase "信号不好" (xìnhào bù hǎo, "poor signal") is a common complaint in rural areas or crowded cities with high interference.

Conclusion

"信号" (xìn hào) is a practical noun meaning "signal," essential for discussing technology, communication, and even social cues. Remember it as a combination of "message" (信) and "sign" (号). Use it to talk about Wi-Fi, traffic lights, or subtle hints in daily life!