"roughshod" in the adjective sense
1. roughshod
of a horse) having horseshoes with projecting nails to prevent slipping
2. barbarous, brutal, cruel, fell, roughshod, savage, vicious
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"
3. heavy-handed, roughshod
unjustly domineering
"incensed at the government's heavy-handed economic policies"
"a manager who rode roughshod over all opposition"
Source: WordNet® (An amazing lexical database of English)
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