電気
でんき · denki · JLPT N5 · noun
electricity
⚡💡 電気 = electric (電) + energy/spirit (気): the energy of lightning
電 means electricity and originally lightning; 気 is the same ki as in 元気 (genki) and 天気 (tenki), meaning energy or air. Together: lightning-energy. In daily speech 電気 also means the lights, as in 電気をつける, turn on the light.