Electricity
電(デン)気(キ) - electricity
denki
電(デン)子(シ) - an electron
denshi
電(デン)車(シャ) - a train
densha
電(デン)話(ワ) - a telephone
denwa
The part looking like 甲 under 雨 (rain) represents lightning.
rain + lightning = electricity
cf. 雷
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Radical: 雨
Stroke Count: 13
音:デン
訓:-
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