surety
n[C, U]
1 (money, etc given as a) guarantee that sb will pay his debts, perform a duty, etc 擔保; 保證; 保證金; 擔保品
offer 100 as
(a) surety 愿出100英鎊作保證金.
2 person who makes himself responsible for the payment of debts, etc by sb else 擔保人; 保證人
stand (ie act as a) surety for sb 做某人的擔保人.
??? 情景例句
I've always tried not to interfere in your affairs.