There are multiple definitions - click on the translation that matches your context.

asekurować

czasownik

full

underwrite

verb

Definitions of underwrite

if a person, group or institution underwrites an insurance policy it agrees to pay the insured party money in case of damage or loss

The African Trade Insurance agency hopes to encourage foreign investment by underwriting risks, ranging from war to confiscation of assets.

to assume the financial risks associated with something, eg by undertaking to buy any unsold shares in a new issue

A syndicate led by Deutsche Bank has agreed to underwrite the subscription of new shares.