

This mattress is too soft for my back.
[ˈðɪs ˈmætrəs ˈɪz ˈtu ˈsɔft fər ˈmaɪ ˈbæk.]
We need to buy a new mattress soon.
[wi ˈnid tə ˈbaɪ ə ˈnu ˈmætrəs ˈsun.]
The hotel's mattresses were really comfortable.
[ðə hoʊˈtɛlz ˈmætrəsəz wər ˈriəli ˈkəmftərbəl.]
"mattress" is in the lesson "Interior" (Level 22), along with 11 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.