The rock was very hard.
Firm or solid to the touch; not easily broken or bent.
This math problem is very hard.
Difficult to understand or deal with.
She studied hard for the exam.
In a manner that is difficult or challenging.
The diamond is a very hard substance.
a solid substance that is difficult to break or damage
Learning a new language can be a real hard.
a difficult or challenging situation or task
強力な無料の画像辞書とフラッシュカード付き。
