換気

かんき

ventilation

JLPT N2

Character Breakdown

Meaning and Usage

"換気" (かんき) means "ventilation" or "air exchange." It refers to the process of replacing stale or indoor air with fresh outdoor air to maintain a healthy and comfortable environment.

Common Contexts

This word is often used when talking about indoor air quality, especially in homes, offices, or public spaces. It is important for preventing stuffiness, reducing odors, and lowering the risk of airborne illnesses.

Typical Collocations

  • 換気扇 (かんきせん): ventilation fan, a common device to improve air circulation.
  • 換気をする: to ventilate, to air out a room.
  • 換気が悪い: poor ventilation, often used to describe stuffy or unhealthy air conditions.

Register and Usage Notes

"換気" is a neutral, standard term used in everyday conversation and formal contexts alike. It is not particularly formal or casual.

Common Mistakes

Learners sometimes confuse "換気" with "空気" (air) or "通気" (also meaning ventilation but less common). Remember that "換気" specifically emphasizes the action or process of exchanging air, not just the air itself.

Example Sentences

へやのかんきをしっかりしてください。

Please ventilate the room properly.

かんきせんをつかってくうきをいれかえましょう。

Let's use the ventilation fan to replace the air.

かんきがわるいと、へやのなかがむしあつくなります。

If ventilation is poor, the room becomes hot and stuffy.