guarantee
//ˌɡærənˈtiː//
Noun
guaranteesPlural
1
A formal promise or assurance that certain conditions will be fulfilled, especially that a product will be repaired or replaced if not of a specified quality
This laptop comes with a two-year guarantee.
2
Something that makes a particular outcome certain or provides security
Hard work is no guarantee of success.
Verb
guaranteedPast tense
guaranteedPast participle
guaranteeingPresent participle
guaranteesThird-person singular
1
To provide a formal assurance or promise, especially that certain conditions will be fulfilled
The company guarantees delivery within 48 hours.
2
To make something certain to happen or to be the case
Hard work doesn't guarantee success, but it increases your chances.