underwrite

/ˌʌndərˈraɪt/
verb
  1. To accept financial responsibility for something, especially by agreeing to pay for costs or losses if they occur; to insure or guarantee.
    • Banks often underwrite large loans for companies expanding their operations.
    • The insurance company agreed to underwrite the policy for the new building.
    • The government decided to underwrite the cost of the research project.
  2. To support or guarantee something, such as an event or project, by providing money or resources.
    • A group of investors will underwrite the startup's initial public offering.
    • The corporation agreed to underwrite the charity's annual fundraiser.
    • Several wealthy donors underwrote the entire cost of the music festival.