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废气 (fèi qì) — waste gas, exhaust fumes

Definition

A technical/environmental term for waste gas and exhaust fumes released by factories, vehicles, and industrial processes. It is the specific term used in pollution and emissions contexts, not a general word for 'smell' or 'gas'.

noun
waste gasexhaust fumes
Measure word · 股

Examples

  • 废气。
    Gōng chǎng pái fàng de fèi qì duì kōng qì wū rǎn hěn yán zhòng.
    The waste gas emitted by factories causes serious air pollution.
  • 废气。
    Qì chē fèi qì zhōng hán yǒu hěn duō yǒu hài wù zhì.
    Car exhaust contains many harmful substances.
  • 废气。
    Jiǎn shǎo fèi qì pái fàng shì bǎo hù huán jìng de zhòng yào cuò shī.
    Reducing exhaust emissions is an important measure to protect the environment.

Origin

Compound word
构词法gòucífǎ
偏正piānzhèngModifier + head

The first part narrows down the second: it says what kind of thing the head is.

废fèidiscard/waste
气qìgas

废 (discard/waste) + 气 (gas) gives waste gas.

Characters in this word

Most characters — around four in five — are built this way: one part hints at the meaning, the other at the pronunciation.

This origin belongs to the traditional form 廢; 废 is its simplified writing.

Meaning part形符xíngfú
广广guǎnghouse
Sound part声符shēngfú
發
發fā廢fèi
The sound has drifted apartThe sound part was a clue two thousand years ago — it often still helps, but not always.

The traditional form 廢 shows 广 as a house and 發 as the sound.

Open 废 →

Most characters — around four in five — are built this way: one part hints at the meaning, the other at the pronunciation.

This origin belongs to the traditional form 氣; 气 is its simplified writing.

Meaning part形符xíngfú
米米mǐrice
Sound part声符shēngfú
气
气qì氣qì
Same sound today

The traditional form 氣 pairs 米 (rice) with 气, which supplies the sound; the simplified 气 is a later abbreviation.

Open 气 →
Appears in
Environment & Ecology

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