

夜中に雷の音で目が覚めました。
雷が鳴ってるから、外に出ないほうがいいよ。
子どもの頃、雷が怖くなかったですか。
"かみなり(雷)" is in the lesson "Disasters" (Level 14), along with 14 other useful words. LinDuo has 180 topic lessons like this one, 2,379 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.