Stony (adjective)

1. Consisting of or resembling stone.
2. Unyielding or unfeeling.
3. Having a hard, unresponsive expression.

Origin:

Old english stānig, of germanic origin; related to dutch steenig and german steinig.

Examples:

1. The path was stony and difficult to walk on.
2. His heart was stony and cold.
3. The stony ground made it difficult to plant the garden.
4. She had a stony expression on her face.
5. He had a stony silence when I asked him about it.