Word · CEFR B2 · Frequency #10399
preventive
预防药；预防疗法
A medicine or treatment that prevents or slows the course of a disease.
- 1.
A contraceptive, especially a condom.
避孕用品,尤其是避孕套
- 2.
remedy that prevents or slows the course of an illness or disease
预防或延缓疾病发展的药物
- 3.
any obstruction that impedes or is burdensome
阻碍物；负担
- 4.
an agent or device intended to prevent conception
避孕用具或药物
避孕药具；避孕套；障碍物；阻碍物；避孕用品,尤其是避孕套；预防或延缓疾病发展的药物；阻碍物；负担
In use
The doctor prescribed a preventive to reduce the risk of infection.
Many travelers carry preventives like insect repellent when visiting tropical areas.
The barrier acted as a preventive against the spread of the disease.
Connections
Collocations
- a preventive against
- 预防某种疾病的药物
- The tablets are used as a preventive against malaria.这些药片被用作预防疟疾的药物。
- take a preventive
- 服用预防药
- Take a preventive before entering the jungle.进入丛林前先服用预防药。
- use a preventive
- 使用避孕药具
- The doctor advised them to use a preventive during sex.医生建议他们性交时使用避孕药具。
- an effective preventive
- 有效的预防药
- A vaccine is an effective preventive against many diseases.疫苗是预防多种疾病的有效方法。
Synonyms
- contraceptive
- 避孕用品 · 与preventive同义，但更常用、更正式，泛指所有避孕药物或器具，多数情况下可直接替换preventive。
Learner notes
Memory Tip
把 preventive 拆成 prevent（阻止）+ ive，记成“用来阻止/预防的东西”：避孕套、预防药、障碍物。
Context & Register
语域：mixed 常见场景：medical and public-health discussion、historical or euphemistic writing about contraception、formal or literary prose preventive 作名词时义项较多：指“预防药/预防措施”多用于医学或公共卫生语境；指“避孕药具（尤指避孕套）”比较常见于历史文本或委婉说法；指“阻碍物/负担”则偏正式书面。总体而言多用于正式或专门场合。
Pronunciation & Spelling
与 preventive /prɪˈvɛntɪv/ 真正押韵的词有 inventive /ɪnˈvɛntɪv/ 和 incentive /ɪnˈsɛntɪv/（重读音节的元音和后面的 /ntɪv/ 相同）；sensitive /ˈsɛnsɪtɪv/ 和 tentative /ˈtɛntətɪv/ 拼写上都含 -tive，但重音在第一个音节，发音并不相同。
Usage priority
Collins 词频等级为 1，建议结合例句记忆，而不是只背中文释义。
Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.