taper

a convex shape that narrows toward a point

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

a loosely woven cord (in a candle or oil lamp) that draws fuel by capillary action up into the flame

stick of wax with a wick in the middle

diminish gradually; "Interested tapered off"

give a point to; "The candles are tapered"