also rough-shod, late 15c., "shod with shoes armed with points or calks," from rough (adv.) "in a rough manner" (late 14c.; see rough (adj.)) + shod. Originally of horses shod with the nail-heads projecting from the shoe to prevent slipping on roads. To ride roughshod over something figuratively is by 1861 in that wording.
updated on October 05, 2021