1.Definition: (of a horse) having horseshoes with projecting nails to prevent slipping

2.Definition: (of persons or their actions) able or disposed to inflict pain or suffering

"Stalin's roughshod treatment of the kulaks"

Related Adjective(s):barbarous, brutal, cruel, fell, savage, vicious

3.Definition: unjustly domineering

"A manager who rode roughshod over all opposition"