Pronunciation: /ˌɡerənˈtiː/
noun a formal assurance that certain conditions will be fulfilled, especially that a product will be repaired or replaced if it fails within a certain period of time
A1 I can't guarantee that it will work perfectly, but I'll do my best.
A2 The store offers a money-back guarantee if you are not satisfied with your purchase.
B1 The company provides a guarantee on all their products for up to one year.
B2 The contract includes a guarantee that the work will be completed on time and within budget.
C1 The lifetime guarantee on this product ensures that you will never have to worry about it breaking.
C2 The company's reputation for quality and reliability is a guarantee of their success in the market.
verb to provide a formal assurance or promise, especially that a product will be repaired or replaced if it fails within a certain period of time
A1 I guarantee that I will finish my homework before bedtime.
A2 She guarantees that the package will arrive by Friday.
B1 The company guarantees a full refund if the product is faulty.
B2 The warranty guarantees that the car will be repaired free of charge.
C1 The contract guarantees a minimum level of service for all customers.
C2 His reputation as a reliable mechanic guarantees that he will have steady business.
formal The company offers a money-back guarantee for all their products.
informal I can guarantee you'll have a great time at the party.
slang I can guarantee this movie is a total banger.
figurative His years of experience guarantee success in this field.
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