back.er
n.(名词)One that backs a person, a group, or an enterprise:赞助人,后盾:支持某人、某个团体或某项事业的人:例句:financial backers of a ballet company.芭蕾舞团的资金提供者
A person who bets on a contestant.赌客:对竞争者下赌的人A worker who provides or works with backs or backing.支持物,衬垫物:提供或用背部、内衬制作的工人