tapered       
adjective uk/ˈteɪ.pəd/ us/ˈteɪ.pɚd/
 一头逐渐变得尖细的;锥形的
becoming gradually narrower at one end
  She was wearing black tapered trousers.  她穿着黑色的锥形长裤。 
 Set in a tapered gorge, Tushi is a hamlet of six or seven houses. 涂师坐落在一个锥形的峡谷里,是一个由六七间房子组成的小村庄。 
 - More examples
 - The larvae are cylinder-shaped maggots with tapered heads.
 - The entire tube assembly is tapered and easy to handle.
 - A jacket that's cut in a tapered way in the front will emphasize the hourglass look.