To bind by pledge, or security; to engage.
A subspecies of plum, Prunus domestica subsp. italica.
Something, such as a glove or other pledge, thrown down as a challenge to combat (now usually figurative).
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.