

人を殴るのは絶対にだめです。
駅でけんかがあって、男の人が顔を殴られました。
どうして友達を殴ったんですか。
"なぐる(殴る)" is in the lesson "Accident" (Level 24), along with 9 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.