sparkplug
Translation
spark plug, instigator, catalyst
Examples
The mechanic replaced the old sparkplug.
The mechanic replaced the old spark plug.
She was the sparkplug of the team.
She was the spark plug of the team.
Grammar Patterns
((a sparkplug)) a device in an engine The car needs a new sparkplug.
((the sparkplug of sth.)) the person who inspires a group He is the sparkplug of the project.
Similar Words
Synonyms: (literal) sparking plug; (figurative) catalyst, instigator, prime mover
Etymology
A compound word from 'spark' (an electrical discharge) and 'plug' (an object for stopping a hole).
Memory Tips
Visualize a plug that creates a spark to start an engine. Figuratively, it's a person who 'sparks' an idea or action in a group.