n.

1. 保证；商品保证；保证书[C][U][+that]
   The TV set has a year's guarantee.

   这架电视机有一年的保修期。

   You have my guarantee that I'll finish the job on time.

   我向你保证按时完成工作。

2. 起保证作用的事物[C][（+of）][+that]
   A diploma is no guarantee of efficiency.

   持有文凭不能保证工作效率一定高。

3. 担保品，抵押品[C]
   I can offer my land as a guarantee.

   我可拿出我的地产作抵押品。

4. 保证人；被保证人[C]

vt.

1. 保证；担保[+to-v][+（that）][O1][O8]
   Perfect satisfaction is guaranteed to our customers.

   保证我们的顾客完全满意。

2. 包，管保[+（that）]
3. 保障，保证……免受损失（或伤害等）[（+against/from）]
   The policy guarantees us against all loss.

   这种保险契约保障我们免受任何损失。

n.

1. a formal assurance that certain conditions will be fulfilled, especially that restitution will be made if a product is not of a specified quality.
2. something that ensures a particular outcome.
3. variant spelling of guaranty.
4. less common term for guarantor.

v.

1. provide a guarantee:
   the company guarantees to refund your money.
   ▸provide a guarantee for (a product).
   ▸provide financial security for; underwrite.
2. promise with certainty.