words or statements that are open to more than one interpretation, explanation or meaning, especially if that meaning cannot be determined from its context.
The state of being ambiguous.
A promise to pay a sum of money in the event that another person fails to fulfill an obligation.
One who undertakes to pay money or perform other acts in the event that his principal fails therein.
A substitute; a hostage.
Evidence; confirmation; warrant.
Certainty.
That which makes sure; that which confirms; ground of confidence or security.