guarantee

noun

  1. 1

    a written assurance that some product or service will be provided or will meet certain specifications

  2. 2

    an unconditional commitment that something will happen or that something is true

    there is no guarantee that they are not lying

  3. 3

    a collateral agreement to answer for the debt of another in case that person defaults

verb

  1. 1

    promise to do or accomplish

    guarantee to free the prisoners

  2. 2

    give surety or assume responsibility

    I vouch for the quality of my products

  3. 3

    make certain of

    This nest egg will ensure a nice retirement for us

    Preparation will guarantee success!

  4. 4

    stand behind and guarantee the quality, accuracy, or condition of

    The dealer warrants all the cars he sells

    I warrant this information

Synonyms

Also useful for “guarantee”:Unscrambler