(でんげん)

でんげん
noun
power supply
1. power supply, power source
The source of electrical power for a device.
電源(でんげん)コードを()いた。
I unplugged the power cord.
この機器(きき)電源(でんげん)乾電池(かんでんち)だ。
The power source for this device is dry-cell batteries.
災害(さいがい)(そな)えて非常用(ひじょうよう)電源(でんげん)用意(ようい)しておいたほうがいい。
You should prepare an emergency power source in case of a disaster.
2. power switch
The button or switch that turns a device on or off.
電源(でんげん)()れてください。
Please turn on the power.
電源(でんげん)(はい)らない。
It won't turn on.
Common troubleshooting phrase
使(つか)()わったらパソコンの電源(でんげん)()ってください。
Please turn off the computer when you're done using it.

電源(でんげん) has two distinct meanings: the physical source of electrical power (sense 1) and the power switch or on/off function of a device (sense 2). In everyday conversation, sense 2 is more common.

COMPOUND: (でん) (electricity) + (げん) (source)

COMMON COLLOCATIONS:

  • 電源(でんげん)()れる: to turn on (the power)
  • 電源(でんげん)()る: to turn off
  • 電源(でんげん)(はい)る: power comes on
  • 電源(でんげん)()ちる: power goes out / shuts down
  • 電源(でんげん)ボタン: power button
  • 電源(でんげん)コード: power cord
  • 電源(でんげん)タップ: power strip

USAGE:
電源(でんげん)()れる/()る is used for devices in general. For lights specifically, 電気(でんき)をつける/()す is more natural.

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