Engine room noun phrase
The most important or influential part of a group or organization
Tim is our team's engine room, and everyone loves him.
Ho Chi Minh city is generally regarded as the engine room of the Vietnam economy.
To become important or obvious
In a very prominent position, where it attracts attention
A resource that will allow the possessor to access to power, knowledge or understanding
Used to describe something that has great influence or importance
To say the same thing repeatedly
Ok, I get it! You sound like a broken record, seriously!