What does 電源 mean?
電源 is a Japanese noun meaning “power source, power supply” in English. It can also be translated as “power (button on TV, etc.)” depending on context. It is written as 電源 in kanji, でんげん in hiragana, and dengen in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
回路を調べる前に、電源のスイッチを切りなさい。
You must switch off the power before checking the circuit.