Device That Ignites Fuel in a Car’s Engine
Puzzle 20 of Look up Easy Pack
Question is: Device That Ignites Fuel in a Car’s Engine
and the answer is: SPARKPLUG
Word Meaning:
SPARK PLUG — The part of some internal combustion engines which forms a high-voltage electric spark which ignites the fuel-air mixture to begin the power stroke. (Petrol engines have spark plugs. Diesel engines do not have them because the heat from their high compression ratios supplies the ignition.)
Definitions from Wiktionary.