To assume or take responsibility for a debt or other obligation.
To make something certain.
To give an assurance that something will be done right.
The person to whom a guarantee is made.
A person who gives such a guarantee; a guarantor.
A legal assurance of something, e.g. a security for the fulfillment of an obligation.
More specifically, a written declaration that a certain product will be fit for a purpose and work correctly; a warranty
Anything that assures a certain outcome.
Specifically, to assume financial responsibility for something, and guarantee it against failure.
To sign; to put one's name to.
To support, lend support to, guarantee the basis of.
To agree to pay by signing one's name; subscribe.
To act as an underwriter.
To write below or under; subscribe.