I. ˌger-ən-ˈtē, ˌgär-, ˌga-rən- also ˈger-ən-ˌ or ˈgär-ən-ˌ, ˈga-rən-ˌ noun
Etymology: probably alteration of guaranty (I)
Date: 1680
1. : guarantor
2. : guaranty 1
3. : an assurance for the fulfillment of a condition: as
a. : an agreement by which one person undertakes to secure another in the possession or enjoyment of something
b. : an assurance of the quality of or of the length of use to be expected from a product offered for sale often with a promise of reimbursement
4. : guaranty 4
II. transitive verb
( -teed ; -tee·ing )
Date: 1731
1. : to undertake to answer for the debt, default, or miscarriage of
guarantee a loan
2. : to engage for the existence, permanence, or nature of : undertake to do or secure
guarantee the winning of three tricks
3. : to give security to
guaranteed her against loss
4. : to assert confidently
I guarantee you'll like it