spark plug
US /ˈspɑːrk ˌplʌɡ/
UK /ˈspɑːrk ˌplʌɡ/

1.
candela
a device for firing the explosive mixture in an internal combustion engine
:
•
The mechanic replaced the faulty spark plug.
Il meccanico ha sostituito la candela difettosa.
•
A worn-out spark plug can cause engine misfires.
Una candela usurata può causare mancate accensioni del motore.
2.
scintilla, catalizzatore
a person or thing that is a catalyst for a development or event
:
•
Her innovative idea was the spark plug for the entire project.
La sua idea innovativa è stata la scintilla per l'intero progetto.
•
He acted as the spark plug, motivating the team to achieve their goals.
Ha agito come la scintilla, motivando il team a raggiungere i propri obiettivi.