

電車で行くほうが楽ですよ。
楽な服で来てください。
毎日の料理は楽じゃないです。
"らく(楽)" is in the lesson "Emotions" (Level 42), 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.