Examples of using "твёрдое" in a sentence and their english translations:
Iron is hard.
Iron is hard.
Iron is hard.
Iron is hard.
The wood is hard.
Don't eat hard foods.
Ice is water in solid form.
The common state of this matter is solid.
Bodybuilding is his hobby so he has a very firm tight body with lots of muscle definition.
I drink it, because it's liquid. If it was solid, I would eat it.