waist·band /ˈwes(t)ˌbænd/
  腰帶,束腰帶
  Waist·band n.
  1. The band which encompasses the waist; esp., one on the upper part of breeches, trousers, pantaloons, skirts, or the like.
  2. A sash worn by women around the waist.  [R.]
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  waistband
       n : a band of material around the waist that strengthens a skirt
           or trousers [syn: girdle, cincture, sash, waistcloth]