n. 保证人, 担保人

[法] 保证人

[ noun ]
one who provides a warrant or guarantee to another
<noun.person>

Warranter \War"rant*er\, n.
1. One who warrants, gives authority, or legally empowers.

2. (Law) One who assures, or covenants to assure; one who
contracts to secure another in a right, or to make good
any defect of title or quality; one who gives a warranty;
a guarantor; as, the warranter of a horse.