Assure

1. v. t. To insure; to covenant to indemnify for loss, or to pay a specified sum at death. See Insure.
2. v. t. To make sure or certain; to render confident by a promise, declaration, or other evidence.
3. v. t. To declare to, solemnly; to assert to (any one) with the design of inspiring belief or confidence.
4. v. t. To confirm; to make certain or secure.
5. v. t. To affiance; to betroth.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.