Surety

보증; 보증인; a person who takes responsibility for another's performance of an undertaking, for example their appearing in court or the payment of a debt; money given to support an undertaking that someone will perform a duty, pay their debts, etc.; a guarantee.

stand surety : 보증서다; to agree to be legally responsible if another person fails to pay a debt or to perform a duty

• She will stand surety for him.

• The kids say they stood surety for a loan or something like that.