

母は祖母の世話をしています。
犬の世話は大変ですか。
いろいろお世話になりました。
"せわ(世話)" is in the lesson "Hospital" (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.