Definition, synonyms and related words
plural of guarantee
"The contract includes several guarantees regarding the durability and performance of the machinery."
Third-person singular simple present indicative form of guarantee
"The warranty guarantees that the engine will not fail within the first year."
In plain English: To guarantee something means to promise that it will definitely happen or be true without any doubt.
"The warranty guarantees that you can get a full refund if the phone breaks within thirty days."