taper

带子操作工, 小蜡烛, 尖细, 渐弱, 锥形, 尖塔

a convex shape that narrows toward a point; the property possessed by a shape that narrows toward a point (as a wedge or cone)

尖细的, 分等级的

(使)一头逐渐变细, (使)逐渐减少

diminish gradually