guarantor

詳細解釋：

guar.an.tor

n.（名詞）
One, such as a person or corporation, that makes or gives a promise, assurance, or pledge typically relating to quality, durability, or performance.
保證人：一個人或一個公司，對與質量、耐用性或性能相關的方面提供擔保、保證或誓約