surety
Pronunciation: /ˈʃʊərɪti, ˈʃʊəti/
noun ( plural sureties)
- 1a person who takes responsibility for another’s performance of an undertaking, for example their appearing in court or paying a debt: the rights of wives who act as sureties for their husband’s debts
- money given to support an undertaking that someone will perform a duty, pay their debts, etc.; a guarantee: the magistrate granted bail with a surety of £500


Origin:
Middle English (in the sense 'something given to support an undertaking that someone will fulfil an obligation'): from Old French surte, from Latin securitas (see security)