1. 不受歡迎的；不良的；有害的 If you describe something or someone as undesirable, you think they will have harmful effects.
undesirable的反義詞
e.g. Inflation is considered to be undesirable because of its adverse effects on income distribution... 通貨膨脹被認為是有害的，因為它會(huì )對收入分配產(chǎn)生不利影響。 e.g. A large group of undesirable strangers crashed her party. 一大群不受歡迎的陌生人不請自來(lái)，攪了她的聚會(huì )。
2. 不受歡迎的人；不良分子；危險人物 Undesirables are people who a particular government considers to be dangerous or a threat to society, and therefore wants to get rid of.
undesirable在線(xiàn)翻譯
e.g. The Home Office is usually quick to deport undesirables. 內政部通常會(huì )迅速地將不受歡迎人士驅逐出境。