* Literal meaning: "The years of hard labor had left the farmer with calloused hands, thick and rough from years of gripping tools."
* Figurative meaning: "She had become calloused to the suffering of others, her heart hardened by years of neglect and abuse."
* Descriptive: "His calloused voice rasped with emotion, the words barely audible through the thick smoke."
* Metaphorical: "The city's calloused streets echoed with the sound of sirens, a constant reminder of its harsh reality."
The best way to use "calloused" depends on the context of your writing.