Merriam-Webster's Collegiate® Dictionary, 11th Edition
SPARKLE
I. verb (sparkled; sparkling)
Etymology: Middle English, frequentative of sparken to spark
Date: 13th century
intransitive verb
1. to throw out sparks, to give off or reflect bright moving points of light, to perform brilliantly, effervesce , to become lively or animated , transitive verb to cause to glitter or shine, see: flash sparkly adjective
II. noun
Etymology: Middle English, diminutive of sparke
Date: 14th century
a little spark ; scintillation , the quality of sparkling,
3. animation , liveliness, the quality or state of being effervescent