n.

1. 保证，誓言[C][+to-v][+that]
   I gave him my pledge that I would vote for him.

   我向他保证我将投他的票。

2. 抵押，典当品[C]
   She left her watch as a pledge with the taxi-driver.

   她将手表留给出租车司机作为抵押。

3. 质押，典当[U]
   He put bonds in pledge for a loan.

   他将债券作抵押以取得贷款。

4. （友情等的）信物，证明[C][（+of）]
   Take this ring as a pledge of friendship.

   将这只戒指拿去作为友谊的信物吧。

5. 立誓加入秘密社团的人[C]
6. 祝愿；祝酒[S]
   We drank a pledge to their success.

   我们举杯祝愿他们成功。

7. 戒酒誓愿

vt.

1. 保证给予；许诺；发誓[O1][+to-v][+that]
   He pledged never to come back until he had found her.

   他发誓不找到她决不回来。

2. 使保证；使发誓[（+to）][O2]
   I pledged myself to fulfil the promise I had made.

   我保证实践自己的诺言。

3. 用……抵押，以……典押[（+for）]
   The property was pledged as security for loans.

   这地产被当作贷款的抵押。

4. 为……祝愿；向……祝酒
   Everyone at the table stood up and pledged the success of the new company.

   桌上每个人都起立为新公司的成功祝酒。

n.

1. a solemn promise or undertaking.
   ▸a promise of a donation to charity.
   ▸ (the pledge) a solemn undertaking to abstain from alcohol.
2. Law  a thing that is given as security for the fulfilment of a contract or the payment of a debt and is liable to be forfeited in the event of failure.
   ▸a thing given as a token of love, favour, or loyalty.
3. archaic the drinking of a person's health; a toast.

v.

1. solemnly undertake to do or give something.
2. Law  give as security on a loan.
3. archaic drink to the health of.