エネルギー（エネルギー、enerugiー）
- energy

The Japanese word エネルギー is a loanword from English, directly borrowed from the English word "energy." It generally refers to the capacity to do work or the power required for activity. It can describe various forms of power, vitality, or resources. This word is very commonly used in Japanese and has a broad range of applications. ⚫︎ It can refer to physical energy, such as the energy in food or fuel. ⚫︎ It can also refer to mental or emotional energy, like the feeling of being energized or drained. ⚫︎ Furthermore, エネルギー is also used in a figurative sense to describe motivation, drive, or enthusiasm.

⚫︎ 朝ご飯を食べたら、エネルギーが出ました。 Translation: I got [energy] after eating breakfast. ⚫︎ 彼はいつもポジティブで、エネルギーに満ちています。 Translation: He is always positive and full of [energy]. ⚫︎ このプロジェクトには、たくさんのエネルギーが必要だ。 Translation: This project requires a lot of [energy].

エネルギー is used in a wide range of situations, from everyday conversations about feeling tired to more technical discussions about physics. ⚫︎ You can use it when talking about how you feel (e.g., "I have no エネルギー today."). ⚫︎ It's also suitable when discussing the power source for devices (e.g., "This device runs on エネルギー"). ⚫︎ You can use エネルギー to describe someone's enthusiasm or motivation.

エネルギー is written in katakana, as it is a loanword. ⚫︎ Katakana: エネルギー ⚫︎ The pronunciation is the same as the English word "energy." ⚫︎ There are no variations in okurigana, as it is a foreign word.

⚫︎ 力 (ちから) - Power, strength ⚫︎ 活力 (かつりょく) - Vitality, vigor ⚫︎ 元気 (げんき) - Health, energy (used more for feeling energetic) ⚫︎ パワー - Power (another loanword)

⚫︎ 疲労 (ひろう) - Fatigue ⚫︎ 無力 (むりょく) - Powerlessness, weakness ⚫︎ 無気力 (むきりょく) - Lethargy, apathy

最近、仕事で疲れて、エネルギーが足りない感じがする。 ・Translation: Recently, I'm tired from work, and I feel like I lack [energy]. ・Explanation: This sentence describes the feeling of being drained and lacking the vitality needed for daily tasks.

太陽エネルギーは地球にとって不可欠です。 ・Translation: Solar [energy] is essential for the Earth. ・Explanation: This sentence uses エネルギー to refer to a source of power, in this case, solar power.

The word エネルギー is derived directly from the English word "energy." It entered the Japanese language as a loanword, reflecting the influence of Western science and technology.