taboo
[təˈbu, tæ-]
n.
禁忌;
忌讳;
戒律;
禁忌的事物（或行为）;
adj.
禁忌的，忌讳的;
vt.
把…列为禁忌，禁止;
例句:
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That cultural taboo, that tradition has been there.
来自BBC
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The Celtic word "geis" is usually translated as "taboo".
凯尔特语中的geis一词通常被译作taboo（禁忌）。
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In the main, children are taboo in the workplace.
工作场所基本上禁止儿童进入。
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The topic of addiction remains something of a taboo.
毒瘾仍然是个有些忌讳的话题。
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Like many other things it is a taboo word.
来自WSJ
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Detailed planning Death is no taboo for Mandy Paine.
来自BBC