If an institution or company underwrites an activity or underwrites the cost of it, they agree to provide any money that is needed to cover losses or buy special equipment, often for an agreed fee.
例句
...58,500 dollars to underwrite a new home...58,500美元承保一個新居The government will have to create a special agency to underwrite small business loans...政府需要設立專門機構來為小企業貸款作擔保。