

この山には多くの危険があります。
危険を感じたら、すぐに引き返してください。
一人で旅行するのに危険はありませんか。
"きけん(危険)" is in the lesson "Adventures" (Level 36), along with 15 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.