

熱はないけど、体がだるいです。
朝から体がだるくて、仕事に集中できませんでした。
昨日は一日中だるかったけど、今日は元気だよ。
"だるい" is in the lesson "Health" (Level 26), along with 12 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.