

Let's take the underground to the city centre.
[ˈlɛts ˈteɪk ðə ˈəndərˌɡraʊnd tə ðə ˈsɪti ˈsɛntər.]
Is the underground open on Sundays?
[ˈɪz ðə ˈəndərˌɡraʊnd ˈoʊpən ˈɔn ˈsənˌdeɪz?]
I don't like the underground at rush hour.
[aɪ ˈdoʊnt ˈlaɪk ðə ˈəndərˌɡraʊnd ət ˈrəʃ ˈaʊər.]
"underground" is in the lesson "Transport" (Level 12), 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.