n.
    - a formal assurance that certain conditions will be fulfilled, especially that restitution will be made if a product is not of a specified quality.
 - something that ensures a particular outcome.
 - variant spelling of guaranty.
 - less common term for guarantor.
 
v.
 (guarantees, guaranteeing, guaranteed)
  - provide a guarantee:
 the company guarantees to refund your money.
 ▸provide a guarantee for (a product).
 ▸provide financial security for; underwrite.
 - promise with certainty.
 
 
  Etymology
  C17: perh. from Sp. garante, corresp. to Fr. garant (see warrant), influenced by Fr. garantie ‘guaranty’.