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You almost never meet this word by itself. People say someone rides roughshod over other people, meaning they push on with what they want and do not care whose feelings they hurt or whose ideas they crush. The old picture is a horse fitted with rough shoes — shoes with nails or sticking out — that tore up the ground, and anything in the way. So a boss who rides roughshod over a team tramples opinions the way that horse trampled the road. It is a strong, slightly old-fashioned phrase, more at home in news and complaints than in casual chat. Though actually, the tidy dictionary line makes it look like a free verb; in real English the shape is almost always ride roughshod over …
（ride roughshod over）踐踏、完全不理會（別人的感受或意見）
原始詞典資料2 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
roughshodadj/ˈɹʌfʃɒd/
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farrieryhobbieshorsesOf a horse: having hooves shod with horseshoes that have calks or projecting parts to prevent slipping.
- The horses fell down three times, the roads being slippery, and we walked three miles to Linlithgow. There we waited two hours, to have the fresh horses roughshod.
- Those who have followed a French army well know that their horses are always rough-shod. [...] Horses can bear cold when properly fed, and if they had not been rough-shod there were farriers attached to the army.
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Brutal or domineering.
- She proved to be completely defenseless against her husband, both because of her own culture that demanded abject submission to the male, and because of her fearful reaction to his roughshod behavior toward her.
- In the roughshod horny world of boys, I had studied my companions closely to make sure that I wasn't being too "queer" for them.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。