guarantee

US /ˌɡer.ənˈtiː/
UK /ˌɡer.ənˈtiː/
"guarantee" picture
1.

a formal promise or assurance that certain conditions shall be fulfilled, especially that a product will be repaired or replaced if not of a specified quality and durability

:
The television comes with a two-year guarantee.
We offer a money-back guarantee if you're not satisfied.
2.

a formal promise or assurance that something will be done or will happen

:
There is no guarantee that the plan will succeed.
His presence is a guarantee of success.
1.

provide a formal assurance or promise regarding a product or event

:
We guarantee to deliver within 24 hours.
The company guarantees its products against defects.
2.

provide security for (a debt or obligation)

:
His assets were used to guarantee the loan.
The bank will guarantee your mortgage.