However, there are a few ways to create words related to "hard" using suffixes:
* -en: This suffix can be used to form adjectives meaning "made of" or "like," and can sometimes imply hardness. For example, "wooden" (made of wood) or "golden" (like gold).
* -y: This suffix can be used to form adjectives meaning "having the quality of" and can sometimes imply hardness. For example, "stony" (having the quality of stone).
* -ish: This suffix can be used to form adjectives meaning "somewhat like" and can sometimes imply hardness. For example, "hardish" (somewhat hard).
It's important to note that the meaning of these suffixes can vary depending on the specific word they are attached to.
Other options:
You could also use prefixes like "super-" or "ultra-" to create words meaning "very hard," or use words like "hardness," "rigidity," or "toughness" to describe hardness directly.