

ゴミに出す前に、空き缶を潰すのを忘れないでね。
大きなトラックが止めてあった自転車を潰しました。
中の箱を潰さないように運んでください。
"つぶす(潰す)" 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.