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A clampdown is when people in charge suddenly get strict and try to stop something. Crime is the textbook target — a clampdown on drunk driving, on knife crime — but news English stretches it to protests, piracy, spending, unsafe building, almost any behaviour the state or a boss wants less of, fast. It feels like a lid pressed on from above: quick, firm, not a gentle new rule. Slightly informal and very . The noun is usually one word: a clampdown on… The verb is two words: they clamped down on…
強力掃蕩、取締（台灣新聞這樣說；中國常用「嚴打」。對活動或言論突然收緊，也會說打壓）
組成From the phrasal verb clamp down (press down hard, then get strict about). The noun was made from that verb.
同家族的字
- clampa tool that holds things tightly; clamp down pictures pressing hard from above
原始詞典資料1 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。
clampdownnoun
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A sudden repressive or punitive restriction or control.
- The suspension of the writ of habeas corpus is merely one step towards the imposition of martial law, toward a total clampdown on all forms of peaceful struggle for meaningful change.
- There is already in the EU a clamour for barriers against competing products from Eastern Europe and Asia, and for a Europe-wide clampdown on 'aliens'.
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。