vt.

1. （在……之下）签署；写在……下面（或末尾）
2. 给……保险
3. 认购，认捐
4. 签名同意支付
5. 同意

vi.

1. 经营保险业

v.

1. sign and accept liability under (an insurance policy).
   ▸accept (a liability or risk) in this way.
2. undertake to finance or otherwise support or guarantee (something).
3. engage to buy all the unsold shares in (an issue of new shares).
4. archaic write below something else.