

友達を傷付けてしまって、とても後悔しています。
引っ越しの時、床を傷付けないように気をつけてください。
冗談のつもりでも、人を傷付けることがありますよ。
"きずつける(傷付ける)" is in the lesson "Verbs 5" (Level 17), along with 11 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.