Enter a clue or pattern or both:
The Clue
Combustion system (8 letter answer)
The Answer
IGNITION
Tags
Notes
The answer IGNITION is so rare that it appears less than once every 2500 puzzles.
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Definition
IGNITION as a noun:
1. the process of initiating combustion or catching fire
2. (ignition, ignition system) = the mechanism that ignites the fuel in an internal-combustion engine
3. (ignition, firing, lighting, kindling, inflammation) = the act of setting something on fire