taper

(noun) a convex shape that narrows toward a point.

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

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

(noun) stick of wax with a wick in the middle. Synonyms: candle, wax light.

(verb) diminish gradually. Example: "Interested tapered off."

(verb) give a point to. Synonyms: sharpen, point. Example: "The candles are tapered."