A misapprehension; a belief in something that is in fact not true.
Anything that seems to be something that it is not.
A magician’s trick.
The state of being deceived or misled.
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.