

She's a diligent student and never misses class.
[ˈʃiz ə ˈdɪlədʒənt ˈstudn̩t ənd ˈnɛvər ˈmɪsəz ˈklæs.]
He's the most diligent worker on our team.
[ˈhiz ðə ˈmoʊst ˈdɪlədʒənt ˈwɜrkər ˈɔn ɑr ˈtim.]
Why aren't you as diligent as your sister?
[ˈwaɪ ˈɑrnt ju əz ˈdɪlədʒənt əz jər ˈsɪstər?]
"diligent" is in the lesson "Positive traits" (Level 28), along with 9 other useful words. LinDuo has 180 topic lessons like this one, 2,375 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.