underwrite - definition and synonyms

verb [transitive] 

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present tense
present participleunderwriting
past tenseunderwrote
past participleunderwritten
  1. 1
    to invest money to help someone to start a new project

    We are looking for someone to underwrite our new stadium.

  2. 2
    business to protect someone from loss with an insurance policy
    1. a.
      business to protect a company from loss by agreeing to buy any remaining shares that are not bought by the public when the shares first become available for sale