

Этот туннель проходит под рекой.
This tunnel runs under the river.
В туннеле совсем нет связи.
There's no signal at all in the tunnel.
Мы проехали длинный туннель в горах.
We drove through a long tunnel in the mountains.
"туннель" is in the lesson "Infrastructure" (Level 14), along with 16 other useful words. LinDuo has 180 topic lessons like this one, 2,380 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.