Origin and history of shod

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.

"put shoes on; provide (someone or something) with a shoe or shoes," Middle English shon, from Old English scogan "to shoe," from the root of shoe (n.). In reference to horses from c. 1200. Related: Shoed; shoeing; shod.

1570s, "wearing slippers or loose shoes so that the sole trails after the foot;" see slip (v.) + shod "wearing shoes." The sense of "slovenly, careless" is by 1815, probably from the notion of appearing like one in slippers, or whose shoes are down at the heels. Slipalong (adj.) in the "wearing loose shoes" sense is by 1849.