sparkplug

[spahrk-pluhg]
verb (used with object), sparkplugged, sparkplugging. Informal.
to lead, inspire, or animate something or someone.

Origin:
v. use of spark plug

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
Initially, combustion of the reactant mixture is initiated using a sparkplug.
To say the technology sector is the sparkplug for economic vitality is an
  understatement.
Examination of the engine found one of the two sparkplugs out of its cylinder
  hanging by the sparkplug wire.
There is sufficient oil in the crankcase and even a brand new sparkplug, bright
  and shiny.
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