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c.1300, from Old French seurté, from Latin securitatem (nominative securitas) "freedom from care or danger, safety, security," from securus (see secure). Until 1966, the French national criminal police department was the Sûreté nationale.
one who becomes responsible for another. Christ is the surety of the better covenant (Heb. 7:22). In him we have the assurance that all its provisions will be fully and faithfully carried out. Solomon warns against incautiously becoming security for another (Prov. 6:1-5; 11:15; 17:18; 20:16).