spark1
Pronunciation: /spɑːk/
noun
- 1a small fiery particle thrown off from a fire, alight in ashes, or produced by striking together two hard surfaces such as stone or metal: a log fire was sending sparks on to the rug figurative angry sparks were flashing in her eyes
- a small flash of light produced by a sudden disruptive electrical discharge through the air: there was a spark of light
- a discharge such as this serving to ignite the explosive mixture in an internal-combustion engine.
verb

Phrases
-
spark out
- British informal completely unconscious: I think he would knock Bowe spark out
-
sparks fly
- an encounter becomes heated or lively: sparks always fly when you two get together
-
strike sparks off each other (or one another)
- (of two or more people) creatively inspire each other while working on something: part of the art of opera is to strike sparks off one another

Origin:
Old English spærca, spearca, of unknown origin