surety

Definitions

A person who takes responsibility for another's performance of an undertaking, such as appearing in court or the fulfillment of a debt.

The state of being certain or confident; certainty.

Something that serves as a guarantee or security for the fulfillment of an obligation.

Examples

The defendant was released from custody after a friend acted as a surety for his bail.

He spoke with such surety that no one in the room dared to question his conclusion.

Synonyms

guarantee certainty assurance collateral security warranty pledge

Antonyms

uncertainty doubt insecurity risk hazard indecision question