電源（でんげん、dengeん）
- power supply

The Japanese word 電源 (電源, *dengen*) primarily means "power supply," "power source," or "electricity source." It refers to the device or system that provides electrical power to another device or system. It can also refer to the act of turning on or off the power.

⚫︎ パソコンの電源を入れます。 Translation: I turn on the computer's power. ⚫︎ この電源は100ボルトです。 Translation: This power supply is 100 volts. ⚫︎ 携帯電話の電源が切れました。 Translation: My cell phone's power died.

This word is widely used in various contexts related to electricity and power. You'll use 電源 when talking about: ⚫︎ The device providing power (e.g., the power adapter, a battery). ⚫︎ The act of turning something on or off. ⚫︎ The power supply's specifications (e.g., voltage). ⚫︎ Situations where the power is unavailable.

⚫︎ Kanji: 電源 ⚫︎ Hiragana: でんげん (used to show the pronunciation) ⚫︎ There are no common variations in how it is written. The okurigana is fixed.

⚫︎ 電力（denryoku）: Electrical power, energy. ⚫︎ 供給源（kyoukyuugen）: Source of supply. ⚫︎ Sometimes the context might allow using "power" directly.

⚫︎ 停電（teiden）: Power outage, blackout. ⚫︎ 断電（dansen）: Power cut.

コンセントから電源コードを抜いてください。 ・Translation: Please unplug the power cord from the outlet. ・Explanation: This sentence describes the action of removing the power source from an electrical outlet.

このカメラの電源ボタンはどこですか？ ・Translation: Where is the power button on this camera? ・Explanation: This asks for the location of the button used to turn the device on or off.

The word 電源 is a combination of two kanji: ⚫︎ 電 (*den*): meaning "electricity" or "electric." ⚫︎ 源 (*gen*): meaning "source," "origin," or "fountainhead." Thus, 電源 literally means "electricity source".