Merriam Webster's Day for July Sixteenth. Today's word. UCSD callous spelled C. A. L. L. O. U. S. calluses, an adjective that means being hardened and thickened it can also mean having calluses or feeling no emotion or feeling or showing no sympathy for others hard-hearted. Here's the word used in a sentence from the spectator by Lloyd Evans. No Coward deliberately made the characters callous and cynical. You can't sympathize with any of them. He said if there was heart in the play. It would have been a sad story. A callous spelled C. A. L. L. U. S. is a hard thickened area of skin that develops usually from friction or irritation over time such a hardened area often leaves one less sensitive to touch, so it's no surprise that the adjective callous C.. A. L. L. O. U. S. in addition to describing skin. That's hard thick can also be used as a synonym for harsh or insensitive both words callous. L. L.. U. S. and C. A. L. L.. O. U. S. derive via Middle English from Latin, the figurative sense of callous with an oh entered English almost three hundred years after the literal sense and Robert. Louis Stevenson used it aptly when he wrote in treasure island, but indeed from what I saw, all these buccaneers were as callous as the sea they sailed on. Board of the day I'm Peter Sokolski. Visit Merriam Webster Dot com today for definitions, wordplay and trending word look ups.