

This chair is very hard.
[ˈðɪs ˈtʃɛr ˈɪz ˈvɛri ˈhɑrd.]
The bread is old and hard.
[ðə ˈbrɛd ˈɪz ˈoʊld ənd ˈhɑrd.]
Don't sleep on the hard floor.
[ˈdoʊnt ˈslip ˈɔn ðə ˈhɑrd ˈflɔr.]
"hard" is in the lesson "Properties" (Level 26), 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.