a formal agreement to fulfill an obligation <gave his surety that he would pay back the loan if his sister was unable to for any reason> Related Words oath
a person who takes the responsibility for some other person or thing <a mutual friend agreed to act as surety if I lent my cousin some money, since I wasn't certain that she'd be able to pay it back>
a state of mind in which one is free from doubt <I can't tell you the year in which that event happened with any great surety> Synonyms assurance
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