What is the Greek word for Hard?

There isn't one single perfect Greek word for "hard" as the meaning depends on the context. Here are a few possibilities, depending on what kind of "hard" you mean:

* σκληρός (sklīrós): This is the most common and general word for "hard," referring to physical hardness (like a hard rock) or difficulty (like a hard task).

* δύσκολος (dýskolos): This word means "difficult," "hard to please," or "troublesome." It refers to something that is hard to do or deal with.

* άκαμπτος (ákambtos): This means "unyielding," "inflexible," or "stiff," referring to something that is hard to bend or change.

* στερεός (stereós): This means "solid," "firm," or "stable," and can imply hardness in a structural sense.

To choose the best word, you need to specify the context. For example:

* "A hard rock" would be πέτρα σκληρή (pétra sklīrḗ).

* "A hard problem" would be ένα δύσκολο πρόβλημα (éna dýskolo problīma).

* "A hard heart" might be καρδιά άκαμπτη (kardiá ákambtē).

Therefore, σκληρός (sklīrós) is a good starting point, but the best translation will depend on the specific nuance you want to convey.