cummerbund
/ˈkʌməbʌnd/noun
- a sash worn around the waist, especially as part of a man's formal evening suit（尤指男子晚礼服上的）宽腰带。
词源
early 17th cent.: from Urdu and Persian kamar-band, from kamar 'waist, loins' and -bandi 'band'. The sash was formerly worn in the Indian subcontinent by domestic workers and low-status office workers.