certify

1. (transitive)To attest to (a fact) as the truth.

2. (transitive)To authenticate or verify in writing.

3. (transitive)To attest that a product, service, organization, or person has met an official standard.

   These blankets have been certified as fireproof.

   zertifizieren

   удостоверя́тьudostoverjátʹ, удостове́ритьudostovéritʹ, заверя́тьzaverjátʹ

   сві́дчитиsvídčyty, засві́дчуватиzasvídčuvaty, засві́дчитиzasvídčyty

4. (archaic, transitive)To inform; to tell (a person) that something is true.

5. (archaic, reflexive)To assure (oneself) of something; to ascertain.

1. You're a certified pilot, aren't you?

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2. Tom is a certified public accountant.

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3. Are you certified?

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4. He was a certified history teacher.

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5. What's the difference between regular mail and certified mail?

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