及物动词

1. I warrant you he is telling the truth.
我向你保证他说的是真话。

2. The storekeeper warranted the goods as of the first quality.
店主保证货物品质第一。

名词

1. The police must have a search warrant to search a house.
警察要搜查一座房屋必须有搜查证。

2. He had no warrant for his suspicion.
他没有理由那么怀疑。

3. Have you got a warrant of fitness for your car?
你有没有一张汽车合格证书？

1. 使显得必要(或正当)
If something warrants a particular action, it makes the action seem necessary or appropriate for the circumstances.

e.g. The allegations are serious enough to warrant an investigation...
这些指控很严重，有必要进行一番调查。
e.g. No matter was too small to warrant his attention.
再小的事也会引起他的注意。

noun

1. a writ from a court commanding police to perform specified acts

2. a written assurance that some product or service will be provided or will meet certain specifications

Synonym: guaranteewarranteewarranty

3. formal and explicit approval

e.g. a Democrat usually gets the union's endorsement

Synonym: sanctioncountenanceendorsementindorsementimprimatur

4. a type of security issued by a corporation (usually together with a bond or preferred stock) that gives the holder the right to purchase a certain amount of common stock at a stated price

e.g. as a sweetener they offered warrants along with the fixed-income securities

Synonym: stock warrantstock-purchase warrant