accessory

n. /ækˈsesəri/ B1

配件；附件；配饰

An extra item added to make something more useful or attractive.

仙境例句

The hat shop gave a little brush with every hat, a useful accessory for keeping it clean.

帽子店每卖一顶帽子都送一把小刷子，这个小配件正好用来把帽子刷干净。