Word · CEFR B2 · Frequency #12018
certify
证明；证实
to declare that something is true, especially formally
- 1.
To attest to (a fact) as the truth.
证明(事实)属实
- 2.
To authenticate or verify in writing.
书面证明,书面认证
- 3.
To attest that a product, service, organization, or person has met an official standard.
证明(产品、服务、组织或个人)符合官方标准
书面证明；核证；认证；发给合格证书；证明(事实)属实；书面证明,书面认证；证明(产品、服务、组织或个人)符合官方标准
In use
The accountant certified the check before it was deposited.
The laboratory certified the water as safe to drink.
The doctor certified him as legally insane.
certify that + clause
certify that 后接从句，表示正式证明某事属实。
The accountant certified that the financial statements were accurate.
会计师证明财务报表是准确的。
certify something (as something)
certify...as... 表示认证某物符合某种标准。
The laboratory certified the product as safe for human use.
实验室认证该产品对人类使用是安全的。
certify someone + adjective
certify sb + adj. 常用于法律或医学语境，宣布某人处于某种状态。
Connections
Collocations
- certify a document
- 核证文件；证明文件属实
- A notary certified the document.公证人核证了这份文件。
- certify that...
- 证明……；作证……
- The doctor certified that the patient was fit for work.医生证明这名病人可以工作了。
- certify compliance
- 认证符合标准；证明合规
- An independent agency certified the factory's compliance with safety regulations.一家独立机构认证该工厂符合安全法规。
- certify someone as
- 认证某人为……；发给某人……资格
- The institute certifies engineers as professional project managers.该协会认证工程师为专业项目经理。
- certify a death
- 开死亡证明；证实死亡
- The coroner certified her death as accidental.验尸官证实她是意外死亡。
Learner notes
Memory Tip
certify 里有 certificate（证书），把它想成给事实盖上一枚‘证书印章’，证明属实、达标。
Context & Register
语域：formal 常见场景：legal documents、official certification、professional accreditation certify 多用于正式语境，强调书面或官方的证明、认证；日常口语中很少单独使用，比较常出现在法律、行政、专业资质或产品合规等场景。
Pronunciation & Spelling
None of these words is a true rhyme with certify (/ˈsɜːrtɪfaɪ/): they all end in -ify /ɪfaɪ/, but their stressed vowels differ (e.g., /e/, /ɒ/, /æ/). Use them only as spelling lookalikes, not rhymes.
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.