1. present participle of guarantee; promising or assuring that something will happen or that a product will work as stated
Usage: common in legal and commercial contexts
2. present participle of guarantee; providing a formal promise or security that a debt or obligation will be fulfilled
Usage: legal/financial context

Examples

• The manufacturer is guarantying that the device will last for five years.
• By guarantying the loan, he became responsible if the borrower defaulted.
• The company is guarantying customer satisfaction with a full refund policy.
• She is guarantying her brother's apartment lease as a co-signer.
• The warranty is guarantying free repairs for the first year.
• They are guarantying the quality of their products through rigorous testing.