One who indorses or stands behind a person or a movement.

赞助者。

Person or company that buys time on a radio or television show to advertize something.

电台或电视台之节目提供者；广告客户。

One who binds himself to be another's obligations in case of default.

保证人。

A godfather or godmother.

教父；教母。

To stand behind; indorse.

赞助。

To be surety for.

保证。