This is the 866th most frequent Japanese word.
電気
Electricity.
The word '電気' refers to the electric light, such as a lamp or overhead light, that can be turned on or off.
電気をつけてください。
Please turn on the light.
In this context, '電気' signifies the availability of electrical energy, meaning the house lacks a power supply.
その家は電気がありません。
That house has no electricity.
Here, '電気' is part of a compound noun '電気自動車,' which means 'electric car,' signifying a vehicle that is powered by electricity.