guarantee

To guarantee is to promise or to a make binding agreement. If a baseball player guarantees his team will win the World Series, he better not lead the league in strikeouts.

Guarantee is a word that is both a noun and a verb: the noun means "a binding agreement" and the verb is the act of making that agreement. This word seems to have come from garante, the Spanish word for "protect" and it's related to the Old French word warrant, which means "to authorize." Today, we often come across guarantee in advertisements, and you might wonder how they might guarantee to make your social life better if your teeth are whiter!

Definitions of guarantee
  1. noun
    an unconditional commitment that something will happen or that something is true
    “there is no guarantee that they are not lying”
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    types:
    safety net
    a guarantee of professional or financial security
    full faith and credit
    a guarantee to pay interest and principal on debt; usually issued by the United States Treasury
    type of:
    assurance, pledge
    a binding commitment to do or give or refrain from something
  2. noun
    a collateral agreement to answer for the debt of another in case that person defaults
    synonyms: guaranty
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    type of:
    collateral
    a security pledged for the repayment of a loan
  3. noun
    a written assurance that some product or service will be provided or will meet certain specifications
    synonyms: warrant, warrantee, warranty
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    types:
    security, surety
    a guarantee that an obligation will be met
    deposit
    a payment given as a guarantee that an obligation will be met
    stock warrant
    a written certificate that gives the holder the right to purchase shares of a stock for a specified price within a specified period of time
    type of:
    assurance, pledge
    a binding commitment to do or give or refrain from something
  4. verb
    give surety or assume responsibility
    synonyms: vouch
    assure, ensure, insure, secure
    make certain of
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    types:
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    bail
    secure the release of (someone) by providing security
    stipulate
    give a guarantee or promise of
    secure
    assure payment of
    certify
    guarantee payment on; of checks
    type of:
    pledge, plight
    promise solemnly and formally
  5. verb
    promise to do or accomplish
    guarantee to free the prisoners”
    synonyms: undertake
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    types:
    subvent, subvention, underwrite
    guarantee financial support of
    type of:
    assure, promise
    make a promise or commitment
  6. verb
    stand behind and guarantee the quality, accuracy, or condition of
    synonyms: warrant
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    types:
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    cover, insure, underwrite
    protect by insurance
    certify, endorse, indorse
    guarantee as meeting a certain standard
    reinsure
    insure again by assuming all or a part of the liability of an insurance company already covering a risk
    indemnify
    secure against future loss, damage, or liability; give security for
    type of:
    back, endorse, indorse, plump for, plunk for, support
    be behind; approve of
  7. verb
    make certain of
    “Preparation will guarantee success!”
    synonyms: assure, ensure, insure, secure
    vouch
    give surety or assume responsibility
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    types:
    doom
    make certain of the failure or destruction of
    make
    assure the success of
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