the quality or state of being hard

the difficulty of a substance to be scratched or dented

कठोरता

English Usage: The hardness of the diamond makes it the hardest natural material.

Hindi Usage: डायमंड की कठोरता इसे सबसे कठोर प्राकृतिक सामग्री बनाती है।

the condition of being firm or unyielding

मजबूत या अडिग होने की स्थिति

English Usage: His hardness in negotiations earned him a reputation as a tough businessman.

Hindi Usage: बातचीत में उसकी कठोरता ने उसे एक कठिन व्यवसायी के रूप में प्रसिद्धि दी।