roughshod

(of a horse) having horseshoes with projecting nails to prevent slipping

(of persons or their actions) able or disposed to inflict pain or suffering; "a barbarous crime"; "brutal beatings"; "cruel tortures"; "Stalin's roughshod treatment of the kulaks"; "a savage slap"; "vicious kicks"

unjustly domineering; "incensed at the government's heavy-handed economic policies"; "a manager who rode roughshod over all opposition"