ignition [ignitions](the act of igniting) noun [UK: ɪɡ.ˈnɪʃ.n̩] [US: ɪg.ˈnɪʃ.n̩]John left his keys in the ignition. = John lasciò le sue chiavi nell'accensione.
candela di accensionenoun {f}
spark plug(part of an internal combustion engine) noun [UK: spɑːk plʌɡ] [US: ˈspɑːrk ˈpləɡ]