spark

noun

1
merriment expressed by a brightness or gleam or animation of countenance
he had a sparkle in his eye
there's a perpetual twinkle in his eyes
2
Scottish writer of satirical novels (born in 1918)
he had a sparkle in his eye
there's a perpetual twinkle in his eyes
3
a momentary flash of light
4
a small fragment of a burning substance thrown out by burning material or by friction
5
electrical conduction through a gas in an applied electric field
6
a small but noticeable trace of some quality that might become stronger
a spark of interest
a spark of decency

1
put in motion or move to act
trigger a reaction
actuate the circuits
2
emit or produce sparks
A high tension wire, brought down by a storm, can continue to spark

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