SURETY

noun (plural -ties) Etymology: Middle English seurte, from Anglo-French seurté, from Latin securitat-, securitas security, from securus Date: 14th century the state of being sure: as, sure knowledge ; certainty , confidence in manner or behavior ; assurance , 2. a formal engagement (as a pledge) given for the fulfillment of an undertaking ; guarantee , a basis of confidence or security, one who has become legally liable for the debt, default, or failure in duty of another, ~ship noun