Noah Webster's New International Dictionary of the English Language

1. (v. t.) To make sure or certain; to render confident by a promise, declaration, or other evidence.

2. (v. t.) To declare to, solemnly; to assert to (any one) with the design of inspiring belief or confidence.

3. (v. t.) To confirm; to make certain or secure.

4. (v. t.) To affiance; to betroth.

5. (v. t.) To insure; to covenant to indemnify for loss, or to pay a specified sum at death. See Insure.