保证书

• guaranty
• guarantee
• recognizance
• binder(lever)
• letter of reference
• letter of guarantee
• warranty

例句

1. 保证书还有效，所以厂家会给修理的。
   It's still under guarantee (ie The guarantee is still valid), so the manufacturer will repair it.
2. 诚实人的诺言实际上就是他的保证书。
   An honest man's word is as good as his bond.

近反义词

【近义词】

• 保证
• 保状
• 军令状
• 甘结