suspender
/səˈspendə(r)/noun
1
- （常作suspenders）Brit. an elastic strap attached to a belt or garter, fastened to the top of a stocking to hold it up〈英〉吊袜带。
2
suspenders
N. Amer. a pair of braces for holding up trousers〈北美〉（裤子的）背带。